case study questions on biological classification class 11

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case study questions on biological classification class 11

11th Standard CBSE

Class 11th Biology - Biological Classification Case Study Questions and Answers 2022 - 2023

Class 11th Biology - Biological Classification Case Study Questions and Answers 2022 - 2023 Study Materials Sep-09 , 2022

QB365 provides a detailed and simple solution for every Possible Case Study Questions in Class 11 Biology Subject - Biological Classification, CBSE. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Biological classification case study questions with answer key.

Final Semester - June 2015

Since the dawn of civilisation, there have been many attempts to classify the living organisms. The classification was done instinctively based on the use of the organisms for human benefits and not on any scientific criteria. (a) Who was the first to classify organisms on a scientific basis? (b) How did he classify plants? (c) How did he classify animals?

Linnaeus classified aU organisms into two kingdoms Plantae and Animalia; this system was used till recently. But now it has been found that the two kingdom system of classification is inadequate. (a) Give four reasons to justify that the two-kingdom system of classification is inadequate. (b) Who proposed the five-kingdom classification?

Though the bacterial cell structure is very simple, they are very complex in their behaviour. Bacteria as a group show the most extensive metabolic diversity. (a) Mention the different modes of nutrition shown by bacteria. (b) How do Archaebacteria differ from other eubacteria?

Kingdom Protista is an artificial assemblage of unicellular eukaryotic organisms and its boundaries are not well-defined. This kingdom forms a link with other kingdoms, Plantae, Animalia and Fungi. (a) Mention two characteristics in which certain protists resemble plants. (b) Slime moulds resemble fungi in certain aspects and animals in some other aspects. Mention one feature each of fungi and animals, in which slime moulds resemble them. (c) Mention two features in which protozoans resemble Animalia.

Kingdom Plantae includes all eukaryotic chlorophyUbearing, autotrophic organisms. A few members are parasites or partially heterotrophic like insectivorous plants. (a) Name two insectivorous plants. (b) Give an example of a parasitic plant. (c) All plant cells have a cell wall. What is it mainly made of? (d) What is meant by alternation of generations?

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If you are finding it difficult to solve Class 11 Biology Case Study Questions, you are not alone. Many students face difficulties in solving such questions, as they require in-depth knowledge of the subject. However, with the right resources and guidance, it is possible to overcome these difficulties. One of the best resources for Class 11 Biology Case Study Questions is the myCBSEguide app.

myCBSEguide provides detailed information and Class 11 Biology Case Study Questions that can help you understand the concepts better. Class 11 Biology students can also find several practice questions at the end of each chapter that can help Class 11 Biology students in understanding the concept better.

Biology: The study of living organisms

Biology is the study of life and all living things. It is a natural science that covers a wide range of topics, from the structure and function of the human body to the behavior of plants and animals. Class 11 biology students learn about the various branches of biology, such as anatomy, physiology, ecology, and evolution. In addition, they also study the cell, the building block of all living things. By understanding how cells work, students can better understand how the body works as a whole.

Class 11 students entering the world of Biology

For Class 11 students, biology is the foundation for Class 12 CBSE students. It is a vital topic that helps students grasp the fundamental notions of life and living beings. Cell structure and function, genetics, evolution, ecology, and plant and animal physiology are all themes addressed in biology. Biology is a fascinating topic that teaches students about the natural world around them. Biology is an excellent foundation for Class 11 CBSE students who want to pursue a career in medicine. Biology is critical for understanding the human body and its processes, as well as developing medical remedies.

Significance of Biology for class 11 students

Biology encourages students to learn the fundamentals of biology.
It promotes a rational/scientific attitude toward issues such as population, environment, and development by encouraging the acquisition of new information and its application to individuals and society.
It raises public knowledge of environmental issues, problems, and remedies.
It raises students’ understanding of the diversity of living species and fosters respect for other living beings.
It understands that even the most complicated biological phenomena are based on fundamentally simple processes.

Case study questions in Class 11 Biology

Case studies are a part of to Class 11 biology examination paper pattern. These case studies can be used to assess a student’s understanding of a subject as well as their ability to apply that understanding in a real-world context. Incorporating case study questions into Class 11 Biology can provide students with a more hands-on and realistic experience with the subject. Class 11 Biology students can better learn how chemical concepts are utilized in the real world by going through real-life problems. Class 11 Biology Case study questions can also aid in the development of critical thinking and problem-solving abilities.

Examples of Class 11 Biology Case Study Questions

We must solve a range of Class 11 Biology case study questions in order to achieve high grades in Biology. Class 11 Biology students must be seeking some examples of case study questions in order to improve their grades. myCBSEguide has prepared a variety of Class 11 Biology case study questions that will undoubtedly assist all students studying the subject. We have compiled a selection of Class 11 Biology case study questions for you. Have a look at the following Class 11 Biology case study question examples.

Class 11 Biology case study questions 1

Read the following and answer any four questions: The detailed structure of the membrane was studied only after the advent of the electron microscope in the 1950s. Meanwhile, chemical studies on the cell membrane, especially in human red blood cells (RBCs), enabled the scientists to deduce the possible structure of the plasma membrane. These studies showed that the cell membrane is composed of lipids, proteins and carbohydrates.

Nucleic acid
Carbohydrate
Phosphoglycerides
Glycoproteins
Both assertion and reason are true, and reason is the correct explanation of the assertion.
Both assertion and reason are true, and reason is not the correct explanation of the assertion.
Assertion is true but reason is false.
Both assertion and reason are false.

Answer Key:

(b) The lipids are arranged in a bilayer in the plasma membrane with the polar head towards the outer sides and the hydrophobic tails towards the inner part.
(a) The lipid component of the membrane mainly consists of phosphoglycerides.
(c) In human beings, the membrane of the erythrocyte has approximately 52 percent protein and 40 percent lipids.
(b) Depending on the ease of extraction, membrane proteins can be classified into two types – integral or peripheral.
(b) The plasma membrane is selectively permeable to some molecules present on either side of it. Neutral solutes may move across the membrane by the process of simple diffusion along the concentration gradient, i.e., from higher concentration to the lower. Hence, both assertion and reason are true, but reason is not the correct explanation of the assertion.

Class 11 Biology case study questions 2

Read the following and answer any four questions: Plastids are found in all plant cells and in euglenoids. These are easily observed under the microscope as they are large. They bear some specific pigments, thus imparting specific colours to the plants. Plastids consist of numerous membrane layers embedded in a material called the stroma. They have their own genome and ribosomes.

Leucoplasts
Chloroplasts
Chromoplasts
Carotenoids
Amyloplasts
Aleuroplasts
Elaioplasts
(a) The leucoplasts are the colourless plastids of varied shapes and sizes with stored nutrients.
(b) The aleuroplasts store proteins in grains.
(a) Amyloplasts are leucoplasts store carbohydrates (starch) in potato.
(c) The space limited by the inner membrane of the chloroplast is called the stroma.
(c) The chloroplasts contain chlorophyll and carotenoid pigments which are responsible for trapping light energy essential for photosynthesis. The chromoplasts impart colours to the parts of the plant as yellow, orange or red colour. Hence, Assertion is true but reason is false.

Class 11 Biology case study questions 3

Read the following and answer any four questions: In human beings, the lungs are situated in the thoracic chamber which is formed dorsally by the vertebral column, ventrally by the sternum, laterally by the ribs, and on the lower side by the dome-shaped diaphragm. The anatomical setup of the lungs in the thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity. Such an arrangement is essential for breathing. Breathing involves two stages – inspiration and expiration. During inspiration, the atmospheric air is drawn in and during expiration, the alveolar air is released out.

12 – 16
70 – 72
Ribs lift up
Diaphragm flattens
Ribs flatten
Both ribs lift up and diaphragm flattens
Tidal volume
Inspiratory Reserve Volume
Residual Volume
Vital Capacity
6000 to 8000 mL
2500 mL to 3000 mL
1000 mL to 1100 mL
1100 mL to 1200 mL
The movement of air into and out of the lungs is carried out by creating a pressure gradient.
Expiration can occur if the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure.
The diaphragm and a specialised set of muscles help in generation of pressure gradients.
Expiration is initiated by the contraction of diaphragm which increases the volume of thoracic chamber in the antero-posterior axis.

Choose from below the correct alternative.

a. Only I is true
b. I and IV are true
c. III and II are true
d. I and III are true
(a) On an average, a healthy human breathes 12-16 times/minute.
(d) When we breathe in, the ribs are lifted up and the diaphragm flattens which increases the size of the chest cavity. Because of this, the air is sucked into the lungs and fills the expanded alveoli.
(a) Volume of air inspired or expired during normal respiration is called tidal volume.
(d) Residual volume of air is the remaining air in the lungs even after a forcible expiration. This averages 1100 mL to 1200 mL.
(d) The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere. Inspiration can occur if the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure. The diaphragm and a specialized set of muscles – external and internal intercostals between the ribs, help in the generation of pressure gradients. Inspiration is initiated by the contraction of the diaphragm which increases the volume of thoracic chamber in the antero-posterior axis. Hence, statements I and III are true.

Class 11 Biology case study questions 4

Read the following and answer any four questions: Exchange of gases also occurs between blood and tissues. O 2 and CO 2 are exchanged in these sites by simple diffusion mainly based on pressure/concentration gradient. The solubility of the gases, as well as the thickness of the membranes involved in diffusion, are also some important factors that can affect the rate of diffusion.

Atmospheric pressure
Partial pressure
Differential pressure
Capillary pressure
pO 2 – 104 mm Hg, pCO 2 – 40 mm Hg
pO 2 – 104 mm Hg, pCO 2 – 140 mm Hg
pO 2 – 95 mm Hg, pCO 2 – 40 mm Hg
pO 2 – 40 mm Hg, pCO 2 – 45 mm Hg
The given diagram represents the exchange of gases at the alveolus and the body tissues with blood and the transport of oxygen and carbon dioxide.
The amount of CO 2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much lesser compared to that of O 2 .
All the factors in our body are favourable for the diffusion of O 2 from tissues to alveoli and that of CO 2 from alveoli to tissues.
The total thickness of the diffusion membrane is much less than a millimetre.
Only I is true
I and IV are true
III and II are true
I and III are true
(b) Pressure contributed by an individual gas in a mixture of gases is called partial pressure.
(a) Alveoli are the primary sites of exchange of gases.
(c) The diffusion membrane is made up of three major layers.
(d) The values of pO 2 and pCO 2 in the body tissues is: pO 2 – 104 mm Hg, pCO 2 – 40 mm Hg.
(b) The given diagram represents the exchange of gases at the alveolus and the body tissues with blood and the transport of oxygen and carbon dioxide. The amount of CO 2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher compared to that of O 2 . All the factors in our body are favourable for the diffusion of O 2 from alveoli to tissues and that of CO 2 from tissues to alveoli. The total thickness of diffusion membrane is much less than a millimetre.

Dealing with Class 11 Biology case study questions

There are a number of different ways to approach Class 11 Biology case study questions, but the most important thing is to make sure that Class 11 Biology students answer all parts of the question and provide as much detail as possible. In some cases, you may need to research the topic further in order to be able to answer the Class 11 Biology case study questions fully.

When dealing with Class 11 Biology case study questions, it is also important to think about the different perspectives that might be involved. For example, if you are asked to evaluate a particular decision made by a scientist, you will need to consider the impact of that decision from both the scientist’s perspective and the perspective of those affected by the decision.

Answering case study questions can be challenging, but it is an important skill to develop if you want to pursue a career in fields such as business or law. With practice, Class 11 Biology students will be able to approach these questions with confidence and provide well-reasoned, detailed answers.

Class 11 Biology curriculum: As fascinating as Biology itself

The current curriculum of Class 11 Biology provides students with up-to-date principles as well as more extensive exposure to current topics in the discipline. Class 11 Biology curriculum also strives to emphasize the basic concepts that are shared by animals, plants, and microbes, as well as the link between Biology and other fields of study. Class 11 Biology structure provides for a straightforward, sequential flow of ideas. It connects the science of biology to actual life through technological advancements. It connects biological discoveries and breakthroughs to everyday issues including the environment, industry, health, and agriculture. The new curriculum of Class 11 Biology also emphasizes scientific ideas and their application, while ensuring that enough chances and opportunities for mastering and recognizing fundamental concepts remain within its framework.

CBSE Class 11 Biology (Code No. 044)

COURSE STRUCTURE


I	Diversity of Living Organisms	15
II	Structural Organization in Plants and Animals	10
III	Cell: Structure and Function	15
IV	Plant Physiology	17
V	Human Physiology	17

myCBSEguide: An app as intriguing as biology

If you’re looking for an app that’s as intriguing as biology, myCBSEguide is a perfect choice. With millions of downloads, it’s one of the most popular apps on the App Store, and for good reason. myCBSEguide offers extensive coverage of the CBSE curriculum, with detailed explanations of concepts, thousands of practice questions, case study questions and much more. Whether you’re a student, teacher, or parent, myCBSEguide is an essential tool for anyone wanting to learn more about biology.

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CBSE Important Questions for Class 11 Biology are available in Printable format for Free Download.Here you may find NCERT Important Questions and Extra Questions for Class 11 Biology chapter wise with answers also. These questions will act as chapter wise test papers for Class 11 Biology. These Important Questions for Class 11 Biology are as per latest NCERT and CBSE Pattern syllabus and assure great success in achieving high score in Board Examinations

Total Papers :

Class 11 Biology Marks Distribution
Units	Marks
Diversity of Living Organisms	15
Structural Organisation in Plants and Animals	8
Cell: Structure and Function	15
Plant Physiology	15
Human Physiology	17
Total	70

Biology Topics to be covered for Class 11 Science

The Living World
Biological Classification
Plant Kingdom
Animal Kingdom
Morphology of Flowering Plants
Anatomy of Flowering Plants
Structural Organisation in Animals
Cell-The Unit of Life
Biomolecules
Cell Cycle and Cell Division
Transport in Plants
Mineral Nutrition
Photosynthesis in Higher Plants
Respiration in Plants
Plant - Growth and Development
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and Their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration

Structure of CBSE Biology Sample Paper for Class 12 Science is

Type of Question	Marks per Question	Total No. of Questions	Total Marks
Very Short Answer Type Questions	1	5	5
Short Answer Type Questions - 1	2	7	14
Short Answer Type Questions - 2	3	12	36
Long Answer Type Questions	3	5	15
Total		27	70

For Preparation of exams students can also check out other resource material

CBSE Class 11 Biology Sample Papers

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CBSE Class 11 Biology Revision Notes

Question Bank of Other Subjects of Class 11

Importance of Question Bank for Exam Preparation?

There are many ways to ascertain whether a student has understood the important points and topics of a particular chapter and is he or she well prepared for exams and tests of that particular chapter. Apart from reference books and notes, Question Banks are very effective study materials for exam preparation. When a student tries to attempt and solve all the important questions of any particular subject , it becomes very easy to gauge how much well the topics have been understood and what kind of questions are asked in exams related to that chapter.. Some of the other advantaging factors of Question Banks are as follows

Since Important questions included in question bank are collections of questions that were asked in previous exams and tests thus when a student tries to attempt them they get a complete idea about what type of questions are usually asked and whether they have learned the topics well enough. This gives them an edge to prepare well for the exam.Students get the clear idea whether the questions framed from any particular chapter are mostly either short or long answer type questions or multiple choice based and also marks weightage of any particular chapter in final exams.
CBSE Question Banks are great tools to help in analysis for Exams. As it has a collection of important questions that were asked previously in exams thereby it covers every question from most of the important topics. Thus solving questions from the question bank helps students in analysing their preparation levels for the exam. However the practice should be done in a way that first the set of questions on any particular chapter are solved and then solutions should be consulted to get an analysis of their strong and weak points. This ensures that they are more clear about what to answer and what can be avoided on the day of the exam.
Solving a lot of different types of important questions gives students a clear idea of what are the main important topics of any particular chapter that needs to focussed on from examination perspective and should be emphasised on for revision before attempting the final paper. So attempting most frequently asked questions and important questions helps students to prepare well for almost everything in that subject.
Although students cover up all the chapters included in the course syllabus by the end of the session, sometimes revision becomes a time consuming and difficult process. Thus, practicing important questions from Question Bank allows students to check the preparation status of each and every small topic in a chapter. Doing that ensures quick and easy insight into all the important questions and topics in each and every individual. Solving the important questions also acts as the revision process.

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Case Study Questions Class 11 Biology Chapter 2 Biological Classifications

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Case Study Questions for Class 11 Biology

Chapter 1: The Living World Chapter 2: Biological Classification Chapter 3: Plant Kingdom Chapter 4: Animal Kingdom Chapter 5: Morphology of Flowering Plants Chapter 6: Anatomy of Flowering Plants Chapter 7: Structural Organisation in Animals Chapter 8: The Unit of Life Chapter 9: Biomolecules Chapter 10: Cell Cycle and Cell Division Chapter 11: Transport in Plants Chapter 12: Mineral Nutrition Chapter 13: Photosynthesis in Higher Plants Chapter 14: Respiration in Plants Chapter 15: Plant Growth and Development Chapter 16: Digestion and Absorption Chapter 17: Breathing and Exchange of Gases Chapter 18: Body Fluids and Circulation Chapter 19: Excretory Products and Their Elimination Chapter 20: Locomotion and Movement Chapter 21: Neural Control and Coordination Chapter 22: Chemical Coordination and Integration

NCERT Solutions for Class 11 Biology Chapter 2 Biological Classification

Looking for NCERT Solutions for Class 11 Biology for Chapter 2 Biological Classification? Look no further because we at BYJU’S, have got students covered. NCERT Solutions are proven to be the go-to resource for students following the latest update on the CBSE Syllabus 2023-24. They are apt resources for students who are looking for the most precise and accurate solutions to all the questions and are completely reliable sources.

BYJU’S offers NCERT Solutions for Class 11, which can be readily accessed and downloaded at the convenience of students. These solutions have been created with the aim of benefitting students with their first board exam preparations; hence they have been framed by professionals having years of experience with the same. Biology is a vast subject, constantly evolving and advancing with developments in the fields of science and technology. In the quest of learning concepts in an interesting approach, revision of concepts are always better if backed with a thorough review from NCERT Solutions for Class 11 Biology , available in a downloadable format at BYJU’S.

NCERT Solutions for Class 11 Biology Chapter 2 – Biological Classification

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ncert solutions jun6 for class 11 biology chapter 2 biological classification 1

Access Answers of Biology NCERT Class 11 Chapter 2 – Biological Classification

1. Discuss how classification systems have undergone several changes over a period of time.

Aristotle was the first to introduce scientific classification. He used simple morphological characters to classify plants into trees, shrubs, and herbs. He divided the animals into two groups, one with red blood and one without.

Linnaeus introduced a two-kingdom classification, which includes Plantae and Animalia, respectively, of plants and animals. But this classification does not classify eukaryotes and prokaryotes, single-celled and multicellular organisms, photosynthetic (green algae) and non-photosynthetic (fungal) organisms. Therefore, the system was found to be less significant as it did not include more features.

Thus, the classification of living organisms has undergone several changes. R.H. Whittaker introduced a five-kingdom classification, including Monera, Protista, Fungi, Plantae and Animalia. Some of the characteristics included in this classification are the structure of cells, body organisation, mode of nutrition, mode of reproduction, and phylogenetic relationship to classify organisms. Subsequently, a three-domain system was proposed, which divided Kingdom Monera into two domains, leaving the remaining eukaryotic kingdoms in the third domain, thereby classifying the six kingdoms.

2. State two economically important uses of:

(a) heterotrophic bacteria

(b) archaebacteria

a) Heterotrophic bacteria are used in the production of vitamins, antibiotics, cheese and curd.

They help fix nitrogen and are used in the formation of humus.

b) Archaebacteria are used in Biogas production.

They are used in the bioleaching of mines.

3. What is the nature of cell walls in diatoms?

In diatoms, cell walls are embedded with silica imparting characteristic patterns onto the walls and are indestructible. These diatoms leave large amounts of cell wall deposits in their habitat to accumulate to form the diatomaceous earth.

4. Find out what the terms ‘algal bloom’ and ‘red tides’ signify.

Algal blooms are found in contaminated water. They are an overgrowth of algae, especially blue-green algae (cyanobacteria). Their growth leads to water pollution. They inhale carbon dioxide and exhale oxygen.

Rapid multiplication of red-pigmented dinoflagellates, such as Gonaulax , gives the sea a red colour, a phenomenon known as red tides. These algae produce toxins that kill fish and other aquatic organisms.

5. How are viroids different from viruses?

(i) Viroids are small infectious agents with single-stranded RNA without a protein coat, but viruses have single-stranded or double-stranded RNA bound with a protein coat.

(ii) Viroids are very small in size compared to viruses.

(iii) Viroids infect only plants, while viruses infect plants, animals, and microorganisms.

6. Describe the four major groups of Protozoa briefly.

Four major groups of Protozoa are as follows:

Amoeboid protozoans: Found in the aquatic environment, they move and catch their prey using pseudopodia.

Flagellated protozoans: These protozoans are free-living or parasitic. Their locomotory structure is flagella.

Ciliated protozoans: They live in aquatic environments, and the presence of cilia makes them actively moving.

Sporozoans: They contain a wide variety of organisms, producing infectious spores throughout their life cycle. Their spore-like phase helps them move from one host to another.

7. Plants are autotrophic. Can you think of some plants that are partially heterotrophic?

Insectivores and carnivorous plants are partially heterotrophic; these organisms are green and autotrophic, but they prey on and digest small components for their nitrogen supply.

Ex; Utricularia, Drosera, Nepenthes.

8. What do the terms phycobiont and mycobiont signify?

Lichens are a symbiotic association of fungi and algae. Phycobiont is part of algae and part of mycobiont fungi. Mycobiont provides structural cover that protects the algae from unfavourable conditions. Similarly, phycobionts prepare food through the process of photosynthesis, which is used by both organisms.

9. Give a comparative account of the classes of Kingdom Fungi under the following:

(i) mode of nutrition (ii) mode of reproduction

Phycomycetes

Ascomycetes

Basidiomycetes

Deuteromycetes

Mode of nutrition

Saprophytic or parasitic

Decomposers, Saprophytic or parasitic or coprophilous

Saprophytic

Decomposers, Saprophytic or parasitic

Mode of reproduction

Asexual reproduction by zoospore (motile) and Aplanospore (non-motile)

Sexual reproduction – zygote can be similar or dissimilar in morphology

Through asexual spores called conidia, and sexual spores are known as ascospores

By vegetation reproduction through budding.

The fusion of two somatic cells for the formation of basidiospores is Plasmogamy

Through asexual spores called conidia.

10. What are the characteristic features of Euglenoids?

The typical features of Eugenoids are:

(i) Absence of cell wall.

(ii) Their body is flexible because there is a protein-rich layer called a pellicle.

(iii) Two flagella of different lengths are found.

(iv) They are autotrophic in the presence of sunlight and heterotrophic in the absence of sunlight.

11. Give a brief account of viruses with respect to their structure and nature of genetic material. Also, name four common viral diseases.

Viruses are infectious agents that crystallise in structure when found outside the host cell. The genetic material is either DNA or RNA (never both), and they are located within the protein core. If the virus that infects plants has single-stranded RNA, then the viruses that infect animals are single or double-stranded DNA or RNA. The capsid is their protein coat, which in turn is made up of small subunits called capsomers, which protect nucleic acid.

Common viral diseases are Influenza, AIDS, Herpes and Rabies.

12. Organise a discussion in your class on the topic ‘Are viruses living or nonliving’?

Non-living Characters

(i) No cellular structure

(ii) They can be stored in bottles like crystals

(iii) There will be no energy storage or energy liberation systems

(iv) They cannot grow or multiply outside the host

Living Characters

(i) They are host-specific

(ii) The presence of genetic material

(iii) The ability to multiply

(iv) They have antigenic properties

(v) They are obligate parasites

(vi) Mutations occur

List of subtopics covered in Chapter 2 – Biological Classification


2.1	Kingdom Monera
2.2	Kingdom Protista
2.3	Kingdom Fungi
2.4	Kingdom Plantae
2.5	Viruses, Viroids, Prions And Lichens

NCERT Solutions for Class 11 Biology Chapter 2 – Biological Classification

Simple differences in the morphological characteristics initially led to the classification of plant and animal species, which further paved the way for classification that was backed by definite scientific research and study. The main criteria for the five-kingdom classification were body organisation, cell structure, mode of nutrition, reproduction, and phylogenetic relationships. In this kingdom of classification, bacteria were included in the Kingdom Monera, while bacteria are cosmopolitan in the distribution.

These entities exhibit tremendous metabolic diversity. Where entities belonging to Kingdom Protista include single-celled eukaryotes, species of Kingdom Fungi exhibit great diversity in their habitat and structure. Kingdom Plantae compromises all eukaryotic chlorophyll-containing entities, while Kingdom Animalia includes heterotrophic eukaryotic, multicellular entities that lack a cell wall.

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CBSE 11th Standard CBSE Biology question papers, important notes, study materials, Previous Year Questions, Syllabus, and exam patterns. Free 11th Standard CBSE Biology books and syllabus online. Important keywords, Case Study Questions, and Solutions.

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Chapter-wise Solved Case Study Questions for Class 11 Biology

Chapter 1 : The Living World
Chapter 2 : Biological Classification
Chapter 3 : Plant Kingdom
Chapter 4 : Animal Kingdom
Chapter 5 : Morphology of Flowering Plants
Chapter 6 : Anatomy of Flowering Plants
Chapter 7 : Structural Organisation in Animals
Chapter 8 : Cell : The Unit of Life
Chapter 9 : Biomolecules
Chapter 10 : Cell Cycle and Cell Division
Chapter 11 : Transport in Plants
Chapter 12 : Mineral Nutrition
Chapter 13 : Photosynthesis in Higher Plants
Chapter 14 : Respiration in Plants
Chapter 15 : Plant Growth and Development
Chapter 16 : Digestion and Absorption
Chapter 17 : Breathing and Exchange of Gases
Chapter 18 : Body Fluids and Circulation
Chapter 19 : Excretory Products and their Elimination
Chapter 20 : Locomotion and Movement
Chapter 21 : Neural Control and Coordination
Chapter 22 : Chemical Coordination and Integration

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NCERT Solutions For Class 11 Biology Biological Classification

July 16, 2019 by phani

Topics and Subtopics in NCERT Solutions for Class 11 Biology Chapter 2 Biological Classification :


2	Biological Classification
2.1	Kingdom Monera
2.2	Kingdom Protista
2.3	Kingdom Fungi
2.4	Kingdom Plantae
2.5	Kingdom Animalia
2.6	Viruses, Viroids and Lichens
2.7	Summary

NCERT Solutions Class 11 Biology Biology Sample Papers

NCRT TEXT BOOK QUESTIONS SOLVED

1.Discuss how classification systems have undergone several changes over a period of time? Soln. Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups on the basis of their similarities and dissimilarities. Scientists have proposed different systems of classification which have undergone several changes from time to time. Earlier Aristotle proposed artificial system of classification, which divided animals and plants on basis of habitat. E.g., Aquatic (fish, whale), terrestrial (e.g., reptiles, cattle) and aerial (e.g., bat, birds). Then, natural system of classification was based on morphology^ anatomy, physiology, reproduction, ontogeny, cytochemistry, etc. After natural system, organisms were classified on basis of evolutionary relationships called phyloge¬netic system. It is based on cytotaxonomy, chemotaxOnomy, numerical taxonomy and cladistic taxonomy.

2.State two economically important uses of: (a) heterotrophic bacteria (b) archaebacteria Soln. (a) Heterotrophic bacteria: They include saprotrophic, symbiotic and parasitic bacteria. They act as natural scavengers as they dispose off the dead bodies, organic wastes, release raw materials for reutilisation. They also help in sewage disposal, manure production etc. Symbiotic bacteria help in nitrogen fixation. Some bacteria arq employed in the production of a number of industrial products like lactic acid, curd, cheese, butter, vinegar etc. Some bacteria are used in preparation of serum, vaccines, vitamins, enzymes, antibiotics etc. e.g., Pseudomonas, Xanthomonas, etc. (b) Archaebacteria : Archaebacteria are employed in the production of gobar gas from dung and sewage and in ruminants, they cause fermentation of cellulose.

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3.What is the nature of cell-wall in diatoms? Soln. The cell walls of diatoms are called frustules. The cell wall is chiefly composed of cellulose impregnated with glass-like silica. It is composed of two overlapping halves (or theca) that fit together like two parts of a soap box or petri dish. The upper half (lid) is called epitheca and the lower half (case) is called hypotheca. The outer covering possesses very fine markings, pits, pores and ridges. The siliceous frustules of diatoms do not decay easily. They pile up at the bottom of water reservoirs and form big heaps called diatomite or diatomaceous earth. It may extend for several hundred metres in certain areas from where the same can be mined.

4.Find out what do the terms ‘algal bloom’ and ‘red tides’ signify. Soln. The rapid increase in populations of algae and other phytoplanktons, in particular cyanobacteria, in water bodies rich in organic matter is called algal bloom. The density of the organisms may be such that it may prevent light from passing to lower depths in the water body. Algal blooms are caused by an increase in levels of nitrate, a mineral ion essential for algal and bacterial growth. The source of increased nitrate may be from agricultural fertilizers, which are leached – into water systems from the land, or sewage effluent. Red tides are caused by a sudden, often toxic proliferation of marine phytoplankton, notably dinoflagellates, that colour the sea red, brown, or yellowish due to the high concentration of the photosynthetic accessory pigments. Some dinoflagellates, such as Gonyaulax, produce potent toxins, which may kill fish and invertebrates outright or accumulate in the food chain, posing a hazard to humans eating shellfish and other seafood. These phytoplanktonic blooms may be related to nutrient-rich inputs from the land, or upwelling oceanic waters, and are initiated by the activation of cyst-like forms lying on the sea bed.

5.How are viroids different from viruses? Soln. Viroids are the smallest known agent of infectious diseases that contain small single-stranded RNA molecule. They lack capsid and have no proteins associated with them. Viroids infect only plants. Whereas, viruses have genetic material surrounded by a protective coat of protein or lipoprotein. The genetic material of viruses are of 4 types – double-stranded DNA, double-stranded RNA, single-stranded DNA, single-stranded RNA. They infect both plants and animals.

6.Describe briefly the four major groups of protozoa. Soln. All protozoans are heterotrophs and live as predators or. parasites. They are be-lieved to be primitive relatives of animals. They are classified into four groups on the basis of locomotory organelles. (i) Amoeboid protozoans : These organisms live in fresh water, sea water or moist soil. They move and capture their prey by developing pseudopodia (false feet) as in Amoeba. Some of them such as Entamoeba are parasites. (ii)Flagellated protozoans : The members of this group are either free-living or parasitic. They have flagella for locomotion. The parasitic forms cause diseases such as sleeping sickness e.g., Trypanosoma. (iii)Ciliated protozoans : These are aquatic, actively moving organisms because of the presence of thousands of cilia. They have a cavity (gullet) that opens to the outside ‘ of the cell surface. The coordinated movement of rows of cilia causes the water laden with food to be steered into the gullet e.g., Paramecium. ~ (iv)Sporozoans: This includes diverse parasitic organisms that have an infectious spore¬like stage in their life cycle. Locomotory organs are absent. The most notorious N . is Plasmodium (malarial parasite) which causes malaria which has a staggering effect on human population.

7.Plants are autotrophic. Can you think of some plants that are partially heterotrophic? Soln. Some insectivorous plants like Drosera, Nepenthes, Utricularia are partially heterotrophic plant. These plants are deficient in nitrogen content but are otherwise autotrophic. They, trap various insects to obtain nitrogen from them. Rest, the food i.e., carbohydrate is manufactured by themselves.

8.What do the terms phycobiont and mycobiont signify? Soln. A lichen is structurally organised entity consisting of the permanent association of a fungus and an alga. The fungal component of a lichen is called mycobiont and the algal component is called phycobiont. Both mycobiont and phycobiont are associated in symbiotic union in which the fungus is predominant and alga is subordinate partner. – ; Fungus provides the structural covering that protects alga from unfavourable conditions, i.e., drought, heat, etc. It also traps moisture from the atmosphere and anchors the lichen to a rock, tree bark, leaves and other similar supports. The alga prepares organic food by the process of photosynthesis from carbon dioxide. If the algal component is cyanobacteria (blue-green alga), they fix atmospheric nitrogen in addition to preparation of food.

9.Organise a discussion in your class on the topic – ‘Are viruses living or non-living’? Soln. Viruses are regarded as intermediate between non-living entities and living organisms. It is very difficult to ascertain whether they are living or non-living. Some . characters of viruses suggest their non-living nature whereas many other characters suggest their living nature. They resemble non-living objects in – (i) Lacking protoplast. (ii)Ability to get crystallised. (iii)Inability to live independent of living cell. (iv)High specific gravity which is found .only in non-living objects. (v)Absence of respiration. (vi)Absence of energy storing system. (vii)Absence of growth and division. Instead different parts are synthesized separately. Viruses resemble living beings in – (i)Being formed of organic macromolecules which occur only in living beings. (ii)Presence of genetic material. (iii)Ability to multiply or reproduce although only inside living cell. (iv)Occurrence of mutations. (v) Occurrence of enzyme transcriptase in most viruses. (vi)Some viruses like Pox virus contains vitamins like riboflavin and biotin. (vii)Infectivity and host specificity. (viii)Viruses are ‘killed’ by autoclaving and ultraviolet rays. (ix)They breed true to their type. Even variations are inheritable. (x) They take over biosynthetic machinery of the host cell and produce chemicals required for their multiplication. (xi)Viruses are responsible for a number of infectious’ diseases like common cold, epidemic influenza, chicken pox.

10.What are the characteristic features of Euglenoids? Soln. The euglenoid flagellates are the most interesting organisms having a mixture of animal and plant characteristics. The characteristic features are: (i) They are unicellular flagellates. (ii)These protists lack a definite cellulose cell wall. Instead the cells are covered by a thin membrane known as pellicle. The pellicle is composed of protein, lipid and carbohydrates. (iii)One or two flagella which help these protists in active swimming are present. If two flagella are present, then one is long and other is short. They are tinsel – shaped i.e., with two longitudinal rows of fine hairs. Each flagellum has its own basal granule. The two flagella join with each other at a swelling, called paraflagellar body and finally only one long flagellum emerges out through the cytostome. (iv)Cell at the anterior end possesses an eccentric mouth or cytostome which leads into a flask-shaped cavity viz. gullet or cytopharynx. Gullet opens into a large basal reservoir. (v) At one end of the reservoir, the cytoplasm contains an orange red stigma (eye spot). The eye spot is a curved plate with orange-red granules and contains red pigment astaxanthin. Both paraflagellar body and eye spot act as photoreceptors. (vi)Just below the reservoir is found a contractile vacuole having many feeding canals. The contractile vacuole takes part in osmoregulation. It expands and pumps its fluid contents in the reservoir. (vii)The mode of nutrition in euglenoids is holophytic or photoautotrophic. Some euglenoids show mixotrophic nutrition (both holophytic as well as saprobic mode). (viii)Cytoplasm is differentiated into ectoplasm and endoplasm. Nucleus is large and occurs roughly in middle. The envelope and nucleolus persist during cell division. (ix)Each chloroplast is composed of a granular matrix traversed by 10-45 dense bands and is covered by 3-membraned envelope. They contain the photo¬synthetic pigments-chlorophyll – n, b. They store carbohydrates as paramylon bodies, scattered throughout the cytoplasm. (x) Asexual reproduction occurs by longitudinal binary fission. The flagellum is duplicated before cell division. (xi)Under unfavourable condition the euglenoids form cysts to perennate the dry period. (xii)Sexual reproduction is not observed.

11.Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases. Soln. Virus (L. poisonous fluid) is a group of ultramicroscopic, non-cellular, highly infectious agents that multiply only intracellularly- inside the living host cells without involving growth and division. Outside the host cells, they are inert particles. They are nucleoproteins having one or more nucleic acid molecule, either DNA or RNA, encased in a protective coat of protein or lipoprotein. A virus consist of two parts – nucleoid (genome) and capsid. An envelope and few enzymes are present in some cases, (i) Nucleoid : The nucleic acid present in the virus is called nucleoid and it represents viral chromosome. It is made up of a single molecule of nucleic acid. It may be linear or circular and nucleic acid can be DNA or RNA. It is the infective part of virus which utilizes the metabolic machinery of the host cell for synthesis and assembly of viral components. (ii)Capsid : It is a protein covering around genetic material. Capsid have protein subunits called capsomeres. Capsid protects nucleoid from damage from physical and chemical agents. , (iii)Envelope : It is the outer loose covering present in certain viruses like animal viruses (e.g., HIV) but rarely present in plant and bacterial viruses and made of protein of viral origin and, lipid and carbohydrate of host. Outgrowths called spikes may be present. Envelope proteins have subunits called peplomers. A virus without envelope is naked virus. (iv)Enzymes : Rarely, lysozymes are found in bacteriophages. Reverse transcriptase enzyme (catalyses RNA to DNA synthesis) is found in some RNA viruses like HIV. Some common viral diseases are – influenza, polio, measles, chickenpox, hepatitis, AIDS, bird flu, SARS (Severe Acute Respiratory Syndrome) etc.

NCERT Solutions For Class 11 Biology Biological Classification Q12

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Case Based Questions Test: Biological Classification - Grade 11 MCQ

15 questions mcq test - case based questions test: biological classification, linnaeus gave two kingdom classification, which consists of kingdom plantae and kingdom animalia. this classification was based on the mode of nutrition, reproduction, presence or absence of cell wall. however, this system had many drawbacks like there was no distinction between eukaryotes and prokaryotes. then, came the three kingdom classification in which single-celled bacteria and protozoans were kept in kingdom protista. this system also failed to classify all living organisms into appropriate categories. finally a five kingdom classification was proposed by dividing all the organisms into five kingdom and it will be accepted as modern system of classification. q. all eukaryotic unicellular organisms belong to :.

B. Protista
D. Bacteria

Linnaeus gave two kingdom classification, which consists of kingdom Plantae and kingdom Animalia. This classification was based on the mode of nutrition, reproduction, presence or absence of cell wall. However, this system had many drawbacks like there was no distinction between eukaryotes and prokaryotes. Then, came the three kingdom classification in which single-celled bacteria and protozoans were kept in kingdom Protista. This system also failed to classify all living organisms into appropriate categories. Finally a five Kingdom classification was proposed by dividing all the organisms into five kingdom and it will be accepted as modern system of classification. Q. The five kingdom classification was proposed by:

A. R. H. Whittaker
B. C. Linnaeus
C. A. Roxburg

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Linnaeus gave two kingdom classification, which consists of kingdom Plantae and kingdom Animalia. This classification was based on the mode of nutrition, reproduction, presence or absence of cell wall. However, this system had many drawbacks like there was no distinction between eukaryotes and prokaryotes. Then, came the three kingdom classification in which single-celled bacteria and protozoans were kept in kingdom Protista. This system also failed to classify all living organisms into appropriate categories. Finally a five Kingdom classification was proposed by dividing all the organisms into five kingdom and it will be accepted as modern system of classification. Q. Biologist who proposed the term protista for unicellular organisms is :

Linnaeus gave two kingdom classification, which consists of kingdom Plantae and kingdom Animalia. This classification was based on the mode of nutrition, reproduction, presence or absence of cell wall. However, this system had many drawbacks like there was no distinction between eukaryotes and prokaryotes. Then, came the three kingdom classification in which single-celled bacteria and protozoans were kept in kingdom Protista. This system also failed to classify all living organisms into appropriate categories. Finally a five Kingdom classification was proposed by dividing all the organisms into five kingdom and it will be accepted as modern system of classification.

Q. Organisms having characteristic of both plants and animals is :

A. Paramoecium
C. Mycoplasma
D. Bacterium

Direction : In the following questions the Assertions (A) and Reasons (R) have been put forward. Read both the statements and choose the correct option from the following:

Assertion : The five kingdom classification is based on the mode of nutrition of organisms.

Reason : The organisms are placed in different group based on the cellular organization.

A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.

Sarcodines are unicellular, jelly-like protozoa found in fresh or sea water and in moist soil. Their body lacks a periplast. Therefore, they may be naked or covered by a calcareous shell. They usually lack flagella and have temporary protoplasmic outgrowths called pseudopodia. These pseudopodia or false feet help in movement and capturing prey. They include free living forms such as Amoeba or parasitic forms such as Entamoeba. Zoo flagellates ciliates and sporozoans are other groups of protozoan protists. They are all unicellular and heterotrophic. They may be holozoic, saprobic or parasitic.

Q. The basis of protozoan classification is:

B. Locomotion
C. Measurement
D. Number of nuclei

Q. Protozoan group with two nuclei, macronucleus & micronucleus is :

A. Flagellata
B. Sarcodina
D. Sporozoa

Q. Which of the following is a flagellated protozoan.

B. Entamoeba
C. Plasmodium
D. Trypanosoma

Q. Which of the following is not the locomotory organ of protozoa.

Pseudopodia

Locomotory organs parapodia not found in protozoans.

Assertion : The heterotrophic protists are found as saprophytes, parasites and predators.

Reason : Heterotrophic protists are eukaryotic and mostly unicellular except few protists.

Lichens are the composite or dual organisms representing a symbiotic association between a fungus and alga. The fungal partner is called mycobiont whereas algal partner is called phycobiont. Algae prepares food for fungi and fungi provides shelter and absorbs mineral nutrient and water for its partner. Lichens grow on barren rocks, cooled volcanic lava and icy tundra soils. They can tolerate extreme dessication and are pioneers of rock vegetation. The are very sensitive to air pollution and do not grow in polluted area. They are very good pollution indicators Certain lichens or source of food for grazing animals.

Q. An association of roots of higher plants and fungi is called:

C. Mycorrhiza

Q. Most of the lichens are formed by _____.

A. Blue-gree algae and club fungi
B. Blue-gree algae and sac fungi
C. Red algae and sac fungi
D. Brown algae and algal fungi

Lichens are the composite or dual organisms representing a symbiotic association between a fungus and alga. The fungal partner is called mycobiont whereas algal partner is called phycobiont. Algae prepares food for fungi and fungi provides shelter and absorbs mineral nutrient and water for its partner. Lichens grow on barren rocks, cooled volcanic lava and icy tundra soils. They can tolerate extreme desiccation and are pioneers of rock vegetation. The are very sensitive to air pollution and do not grow in polluted area. They are very good pollution indicators Certain lichens or source of food for grazing animals.

Q. Mycobiont and phycobiont are found in ________.

A. Mycorrhiza

Q. Lichens are described as indicators of _____.

A. air pollution
B. water pollution
C. soil pollution
D. agricultural productivity

Assertion : Lichens are both algal and fungal cells that act as pollution indicator.

Reason : Lichens grow very fast at the rate of about 2 cm per year.

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NCERT Solutions for Class 11th: Ch 2 Biological Classification Biology

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Unit 2: Biological classification

About this unit.

Learn about the Five Kingdoms of Monera, Protista, Fungi, Plantae and Animalia. Also take a sneak peek at viruses and sub viral particles. This unit is aligned to the Class 11 NCERT curriculum.

Introduction to biological classfication

Prokaryotic and eukaryotic cells (Opens a modal)
Systems of Classification (Opens a modal)
Introduction to Biological Classification 4 questions Practice

Archaea and Bacteria

Archaea (Opens a modal)
Bacteria (Opens a modal)
Archaea and Bacteria 4 questions Practice
Bacteria 4 questions Practice
Protista (Opens a modal)
Protozoa (Opens a modal)
Protista 4 questions Practice
Protozoa 4 questions Practice
Fungi: Death Becomes Them (Opens a modal)
Reproduction in Fungi (Opens a modal)
Classification of Fungi (Opens a modal)
Lichens (Opens a modal)
Characteristics of fungi 4 questions Practice
Classification of fungi 4 questions Practice

Viruses and subviral particles

Viruses (Opens a modal)
Intro to viruses (Opens a modal)
Subviral particles: viroids and prions (Opens a modal)
Viruses, viroids, and prions 4 questions Practice

Biological Classification MCQ Questions with answers

Biological Classification MCQ Questions /objective with answers Class 11 Biology Chapter 2

1. Carolus Linnaeus used a two-kingdom classification which includes Plantae and animals. Currently, we use:

a. Three kingdom classification.
b. Four kingdom classification.
c. Five kingdom classification.

2. Who gave The five-kingdom in 1969:

a. Carolus Linnaeus.
b. Ernst Mayer.
c. R.H. Whittaker.

Table of Contents

3. Demerits of two-kingdom classification is/are:

a. Does not differentiate between autotroph and heterotroph.
b. Unicellular and multicellular organisms, both occupy the same group.
c. Prokaryote and eukaryote have the same group.
d. Does not differentiate between the chitinous cell wall of fungi and the cellulosic cell wall of plants.

4. Unicellular prokaryotes find his place in five kingdom classification as:

b. Protists.

5. The oldest prokaryote is/are:

a. Archaebacteria.
b. Cyanobacteria.
c. Blue-green alga.

6. Study of archaebacteria is important because:

a. They are available in harsh conditions.
b. They differ from other bacteria in cell wall composition.

7. Single-celled eukaryotes find his place as _ _ _ _ in five kingdom classification.

b. Protista.

8. Most protists are:

a. Aquatic.
b. Terrestrial.

9. We classify protists into:

a. Chrysophyste which includes diatoms, golden algae.
b. Dinoflagellates which include Gonyaulax.
c. Euglenois which includes Euglena.
d. Saprophytic protists which include slime mold.
e. Protozoans which includes amoeba.

10. The common mushroom and toadstool that we see commonly belong to:

d. Plantae.

11. Scavengers of the earth are:

12. which among these is/are useful fungi:.

a. Fermentation yeast.
b. P. chrysogenum producing penicillin.
c. Edible mushrooms.

13. Most fungi are :

a. Autotroph.
b. Hetrotroph.
c. Chemolithotroph.

14. Lichen is symbiosis (mutual cooperation) between:

a. Protists and fungi.
b. Algae and fungi.
c. Protists and algae.

15. Mycorrhiza is a symbiotic association between the roots of some plants with _ _ _ _ _.

a. Fragmentation.
b. Fission.
c. Budding.
d. Any of these.

17. Reproduction by spore formation like conidia or sporangiophores is a:

a. Vegetative reproduction.
b. Asexual reproduction.
c. Sexual reproduction.

19. How do we classify fungi?

a. Mycelium morphology.
b. Mode of spore formation.
c. Fruiting body.
d. All of the above.

20. We call sac fungi to:

a. Phycomycocetes.
b. Ascomycetes.
c. Basidiomycetes.
d. Deuteromycetes.

21. P. chrysogenum is a fungus that produce penicillin. This fungi belong to:

22. “fungi imperpecti” is:, 23. we see “alternation in generation” in :, 24. we see nutrition by ingestion “holozoic” in:, 25. there is no place for virus, viroids, prions in five kingdom classification. because:.

a. Their structure do not match with any group.
b. Viruses are not truly living.
The Living world MCQ Biology Questions
Plant Kingdom MCQ Biology Class Eleven
Animal Kingdom MCQ Biology
Morphology of Flowering Plants MCQ
Anatomy of Flowering Plants MCQ Biology
Structural Organisation in Animals MCQ

1. c	7. b	13. b	19. d
2. c	8. a	14. b	20. b
3. e	9. f	15. c	21. b
4. a	10. c	16. d	22. d
5. a	11. c	17. b	23. d
6. c	12. d	18.c	24. b
			25.b

Ref: Chapter 2, NCERT.

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Biological Classification – NCERT based MCQs for NEET

Biological Classification; Class 11 NCERT MCQs for NEET

“ Biological Classification ” is the 2nd chapter of Biology NCERT text book for class 11. This chapter cover six topics including Kingdom Monera , Protista , Fungi , Plantae , Animalia and Viruses , Viroids & Lichens . Within Five kingdom Classification System , Kingdom Monera, Protista & Fungi are illustrated in detail in this chapter while kingdom Plantae & Animalia are briefly described here and given the detail in next two separate chapter.

It is a important chapter for NEET . Every year, three to four MCQs are asked in NEET from this chapter. So, let’s go for practice MCQ from this chapter…

NCERT based MCQ from “Biological Classification”

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The Living World
Biological Classification	Click here
Plant Kingdom
Animal Kingdom
Plant Morphology
Plant Anatomy
Animal Tissue
Earthworm
Cockroach
Cell Biology
Biomolecules
Enzymes
Cell Division
Transport in Plants
Mineral Nutrition
Photosynthesis in Higher Plants	Click here
Respiration in Plants	Click here
Plant Growth and Development	Click here
Digestion and Absorption	Click here
Breathing and Exchange of Gases	Click here
Body Fluied and Circulation	Click here
Excretory Products and their Elimination	Click here
Locomotion and Movement	Click here
Neural Control and Coordination	Click here
Chemical Coordination and Integration	Click here
Reproduction in Organism	Click here
Sexual Reproduction in Flowering Plants	Click here
Human Reproduction	Click here
Reproductive Health	Click here
Principle of Inheritence & Variation	Click here
Moleculer Basis of Inheritance	Click here
Evolusion	Click here
Human Health & Disease	Click here
Strategies for Enhancement in Food Production	Click here
Microbe in Human Welfare	Click here
Biotechnology : Principles & Processes	Click here
Biotechnology & its Application	Click here
Organism & Population	Click here
Ecosystem	Click here
Biodiversity & Conservation	Click here
Enviornmental Issues	Click here

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Case Study Questions Class 11 Biology Plant Kingdom

Case study questions class 11 biology chapter 3 plant kingdom.

CBSE Class 11 Case Study Questions Biology Plant Kingdom. Important Case Study Questions for Class 11 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Plant Kingdom.

CBSE Case Study Questions Class 11 Biology Plant Kingdom

The earliest systems of classification used only gross superficial morphological characters such as habit, colour, number and shape of leaves, etc. They were based mainly on vegetative characters or on the androecium structure (system given by Linnaeus). Such systems were artificial; they separated the closely related species since they were based on a few characteristics. Also, the artificial systems gave equal weightage to vegetative and sexual characteristics; this is not acceptable since we know that often the vegetative characters are more easily affected by environment. As against this, natural classification systems developed, which were based on natural affinities among the organisms and consider, not only the external features, but also internal features, like ultra-structure, anatomy, embryology and phytochemistry. Such a classification for flowering plants was given by George Bentham and Joseph Dalton Hooker.

1) In phylogenetic system of classification, it is believed that organisms belongs to the same taxa have ___________

d) All of the above

3) Why natural classification systems was developed, what was the need of it?

4) Natural classification systems were based on natural affinities among the organisms and consider, not only the external features, but also internal features, like ultra-structure, anatomy, embryology and phytochemistry. Such a classification for flowering plants was given by George Bentham and Joseph Dalton Hooker.

Numerical taxonomyis the branch of taxonomy in which mathematical methods are used to evaluate observable difference and similarities between taxonomic groups of plant.

The algae reproduce by vegetative, asexual and sexual methods. Vegetative reproduction is by fragmentation. Asexual reproduction is by the production of different types of spores, the most common being the zoospores. Sexual reproduction takes place through fusion of two gametes. The algae are divided into three main classes: Chlorophyceae, Phaeophyceae and Rhodophyceae.

1) ______________ is the colonial form of algae.

c) Carragen

d) Mannitol

The gymnosperms are heterosporous; they produce haploid microspores and megaspores. The two kinds of spores are produced within sporangia that are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones. The strobili bearing microsporophylls and microsporangia are called microsporangiate or male strobili. The microspores develop into a male gametophytic generation which is highly reduced and is confined to only a limited number of cells. This reduced gametophyte is called a pollen grain. The development of pollen grains take place within the microsporangia. The cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili. The male or female cones or strobili may be borne on the same tree (Pinus). However, in cycas male cones and megasporophylls are borne on different trees. The megaspore mother cell is differentiated from one of the cells of the nucellus. The nucellus is protected by envelopes and the composite structure is called an ovule. The ovules are borne on megasporophylls which may be clustered to form the female cones. The megaspore mother cell divides meiotically to form four megaspores. One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organs. The multicellular female gametophyte is also retained within megasporangium.

c) Covered in ovary sheath

3) Name the special type of root found in cycus tree.

3) In cycus, small specialised roots i.e. coralloid roots are found. Coralloid roots shows symbiotic association with Nitrogen – fixing cyanobacteria.

They include approximately 960 genera and about 25,000 species. Life cycle of Bryophytes shows sporophytic and gametophytic stages. Vegetative plant body is thalloid or leafy which represents gametophytic generation. Spore producing capsule represents sporophytic generation. Bryophytes have root-like structures called rhizoids. Rhizoids are unicellular in liverworts while multicellular in mosses. Rhizoids absorb water and minerals and also help in fixation of thallus on the substratum. Bryophytes are divided into two groups : liverworts and mosses.

d) Both a and b

c) Sporophytic generation

In plants, both haploid and diploid cells can divide by mitosis. This ability leads to the formation of different plant bodies – haploid and diploid. The haploid plant body produces gametes by mitosis. This plant body represents a gametophyte. Following fertilisation the zygote also divides by mitosis to produce a diploid sporophytic plant body. Haploid spores are produced by this plant body by meiosis. These in turn, divide by mitosis to form a haploid plant body once again. Thus, during the life cycle of any sexually reproducing plant, there is an alternation of generations between gamete producing haploid gametophyte and spore producing diploid sporophyte.

1.) Identify the incorrect statement about haplontic life cycle pattern.

c) Haploid sporophyte

Class 11 Biology Case Study Questions Chapter 4 Animal Kingdom

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In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Downloads of CBSE Class 11 Biology Chapter 4 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve Class 11 Biology Case Study Questions Animal Kingdom to know their preparation level.

Join our Telegram Channel, there you will get various e-books for CBSE 2024 Boards exams for Class 9th, 10th, 11th, and 12th.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Animal Kingdom Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 4 Animal Kingdom

Case Study/Passage-Based Questions

Case Study 1: Animals in which the cells are arranged in two embryonic layers, an external ectoderm, and an internal endoderm, are called diploblastic animals, e.g., coelenterates. An undifferentiated layer, mesoglea, is present in between the ectoderm and the endoderm.

Coelom – The presence or absence of a cavity between the body wall and the gut wall is very important in classification. The body cavity, which is lined by mesoderm is called coelom. Animals possessing coelom are called coelomates, e.g., annelids, mollusks, arthropods, echinoderms, hemichordates, and chordates. In some animals, the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called pseudo coelom and the animals possessing them are called pseudocoelomates, e.g., aschelminthes. The animals in which the body cavity is absent are called acoelomates, e.g., Platyhelminthes.

Segmentation – In some animals, the body is externally and internally divided into segments with a serial repetition of at least some organs. For example, in earthworms, the body shows a pattern called metameric segmentation, and the phenomenon is known as metamerism.

Notochord – It is a mesodermally derived rod-like structure formed on the dorsal side during embryonic development in some animals. Animals with notochord are called chordates and those animals which do not form this structure are called non-chordates, e.g., porifera to echinoderms.

1.) Diploblastic animals are characterized by _________________.

a) External ectoderm cell arrangement
b) Internal endoderm cell arrangement
c) Both a and b
d) None of the above

Ans: c) Both a and b

2.) In coelomates, the body cavity is surfaced by____________

a) Ectoderm
b) Mesoderm
c) scattered pouches
d) Endoderm

Ans: b) Mesoderm

What distinguishes gymnosperms from other seed-producing plants? A) The ovules are enclosed by an ovary wall B) The ovules and seeds remain exposed C) The roots are always fibrous D) The leaves are never compound

What type of roots is associated with N2-fixing cyanobacteria in gymnosperms? A) Tap roots B) Fibrous roots C) Mycorrhizal roots D) Coralloid roots

In gymnosperms like conifers, what is the function of the needle-like leaves? A) Increase water absorption B) Enhance pollination C) Reduce surface area to minimize water loss D) Attract insects for pollination

Which gymnosperm is known for being one of the tallest tree species? A) Cycas B) Pinus C) Sequoia D) Mycorrhiza

What are the male cones or strobili in gymnosperms called? A) Macrosporangiate B) Megasporophylls C) Microsporangiate D) Megaspores

Which type of sporophylls bears the megasporangia in gymnosperms? A) Microsporophylls B) Macrosporophylls C) Strobili D) Male cones

How many megaspores are formed by the megaspore mother cell in gymnosperms? A) One B) Two C) Three D) Four

In which gymnosperm are male cones and megasporophylls borne on different trees? A) Sequoia B) Pinus C) Cycas D) Mycorrhiza

What kind of spores do gymnosperms produce? A) Heterosporous, producing both microspores and megaspores B) Homosporous, producing only one type of spore C) Only megaspores D) Only microspores

Which part of the gymnosperm is protected by envelopes and referred to as an ovule? A) Pollen grain B) Nucellus C) Microsporangia D) Archegonia

Hope the information shed above regarding Case Study and Passage Based Questions for Class 11 Biology Chapter 4 Animal Kingdom with Answers Pdf free download has been useful to an extent. If you have any other queries about CBSE Class 11 Biology Animal Kingdom Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible. By Team Study Rate

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Case Study Questions Class 11 Biology Biological Classification
At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks. CBSE Case Study Questions Class 11 Biology Biological Classification. CASE 1 Bacteria are the sole members of the Kingdom Monera.
Class 11 Biology Case Study Question Chapter 1 to 22
CBSE Class 11 Biology Case Study Question. Chapter 1 : The Living World. Chapter 2 : Biological Classification. Chapter 3 : Plant Kingdom. Chapter 4 : Animal Kingdom. Chapter 5 : Morphology of Flowering Plants. Chapter 6 : Anatomy of Flowering Plants. Chapter 7 : Structural Organisation in Animals. Chapter 8 : Cell : The Unit of Life.
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Class 11th Biology - Biological Classification Case Study Questions and Answers 2022 - 2023 - Complete list of 11th Standard CBSE question papers, syllabus, exam tips, study material, previous year exam question papers, centum tips, formula, answer keys, solutions etc..
Class 11 Biology Case Study Questions Chapterwise PDF Download
Case Study-Based Questions for Class 11 Biology. Chapter 1 : The Living World. Chapter 2 : Biological Classification. Chapter 3 : Plant Kingdom. Chapter 4 : Animal Kingdom. Chapter 5 : Morphology of Flowering Plants. Chapter 6 : Anatomy of Flowering Plants. Chapter 7 : Structural Organisation in Animals.
Class 11 Biology Case Study Questions Chapter 2 Biological
Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 2 Biological Classification. Case Study/Passage-Based Questions. Case Study 1: Phycomycetes - Members of Phycomycetes are found in aquatic habitats and on decaying wood in moist and damp places or as obligate parasites on plants.
Class 11 Biology Case Study Questions
Class 11 Biology case study questions 1. Read the following and answer any four questions: The detailed structure of the membrane was studied only after the advent of the electron microscope in the 1950s. Meanwhile, chemical studies on the cell membrane, especially in human red blood cells (RBCs), enabled the scientists to deduce the possible ...
Case Study Questions Class 11 Biology Chapter 2 Biological Classifications
834 Views. 16 Downloads. Case Study Questions Class 11 Biology Chapter 2 Biological Classifications Biology Class 11 Important Questions Chapter wise CBSE Class 11 Biology Extra Questions and Answers Assertion Reasoning Questions Class 11 Biology Free PDF Download Class 11 Biology CBSE 2022. Download Paper.
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Important Questions for Class 11 Biology- Biological Classification
A.9. The algal component of the lichens is known as phycobiont, while the fungal component is known as mycobiont. Both the algae and the fungi live in symbiotic association with each other. The algae prepare food for the fungi and the fungi, in turn, provides shelter and absorbs nutrients from the soil. Q.10.
Case Study Questions for Class 11 Biology
Case Study Questions for Class 11 Biology. Chapter 1: The Living World. Chapter 2: Biological Classification. Chapter 3: Plant Kingdom. Chapter 4: Animal Kingdom. Chapter 5: Morphology of Flowering Plants. Chapter 6: Anatomy of Flowering Plants. Chapter 7: Structural Organisation in Animals. Chapter 8: The Unit of Life.
NCERT Solutions Class 11 Biology Chapter 2 Biological Classification
3. Readily available in chapterwise and exercise-wise format. 4. PDF format solutions are free for download. 5. Stepwise answers are created based on the CBSE exam marks weightage. Get access to free NCERT Solutions for Class 11 Chapter 2 Biological Classification. Find solutions solved along with steps explained in detail.
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Chapter-wise Solved Case Study Questions for Class 11 Biology. Chapter 1 : The Living World. Chapter 2 : Biological Classification. Chapter 3 : Plant Kingdom. Chapter 4 : Animal Kingdom. Chapter 5 : Morphology of Flowering Plants. Chapter 6 : Anatomy of Flowering Plants. Chapter 7 : Structural Organisation in Animals.
Case Study Questions Class 11 Biology
At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks. CBSE Case Study Questions Class 11 Biology The Living World. CASE 1. Life is a unique process that is made from the aggregation of ...
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NCERT Solutions Class 11 Biology Biology Sample Papers. NCRT TEXT BOOK QUESTIONS SOLVED. 1.Discuss how classification systems have undergone several changes over a period of time? Soln. Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups on the basis of their similarities and dissimilarities.
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The Case Based Questions Test: Biological Classification questions and answers have been prepared according to the Grade 11 exam syllabus.The Case Based Questions Test: Biological Classification MCQs are made for Grade 11 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Case Based ...
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Answer. The four major groups of Protozoa are: • Amoeboid protozoans: These organisms live in fresh water, sea water or moist soil. They move and capture their prey by putting out pseudopodia (false feet) as in Amoeba. Marine forms have silica shells on their surface. Some of them such as Entamoeba are parasites.
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Viruses and subviral particles. Viruses. Intro to viruses. Subviral particles: viroids and prions. Learn about the Five Kingdoms of Monera, Protista, Fungi, Plantae and Animalia. Also take a sneak peek at viruses and sub viral particles. This unit is aligned to the Class 11 NCERT curriculum.
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Biological Classification MCQ Questions with answers. July 1, 2020 by Amit. Biological Classification MCQ Questions /objective with answers Class 11 Biology Chapter 2. 1. Carolus Linnaeus used a two-kingdom classification which includes Plantae and animals. Currently, we use: a.
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"Biological Classification" is the 2nd chapter of Biology NCERT text book for class 11. This chapter cover six topics including Kingdom Monera, Protista, Fungi, Plantae, Animalia and Viruses, Viroids & Lichens.Within Five kingdom Classification System, Kingdom Monera, Protista & Fungi are illustrated in detail in this chapter while kingdom Plantae & Animalia are briefly described here and ...
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Class 11 Biology Case Study Questions Chapter 3 Plant Kingdom
Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 3 Plant Kingdom. Case Study/Passage-Based Questions. Case Study 1: Gymnosperms are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilization. The seeds that develop post-fertilisation, are not ...
Case Study Questions Class 11 Biology
CBSE Case Study Questions Class 11 Biology Plant Kingdom. CASE 1. The earliest systems of classification used only gross superficial morphological characters such as habit, colour, number and shape of leaves, etc. They were based mainly on vegetative characters or on the androecium structure (system given by Linnaeus).
Class 11 Biology Case Study Questions Chapter 4 Animal Kingdom
Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 4 Animal Kingdom. Case Study/Passage-Based Questions. Case Study 1: Animals in which the cells are arranged in two embryonic layers, an external ectoderm, and an internal endoderm, are called diploblastic animals, e.g., coelenterates. An undifferentiated ...

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