phylum mollusca homework and study guide #1

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Bio 11 > Phylum Mollusca > Flashcards

Phylum Mollusca Flashcards

What are the general characteristics of molluscs?

Have 3 cell layers, a coelom, a brain and have a body divided into three regions the head/foot the visceral mass and the mantle

What is a coelom?

It’s a body cavity, or space within the mesoderm. It functions as a hydrostatic skeleton and provides a space for internal organs to be suspended by mesenteries

What is in the head and what’s the functions?

Have a mouth, appendages and sensory organs. Have a radula(a toothed tongue). It is used to scrape off bits of algae or organic material off rocks or tear at plants.

What is the functions of the foot?

For crawling(slugs), for burrowing and locomotion(clams), into tentacles and arms with suckers(squid) for capturing prey, into a siphon for jet propulsion(octopus)

What’s visceral mass?

Soft body portion containing all internal organs

What’s a mantle?

Tissue that surrounds and protects the internal organs; cavity where gills or lungs are located

What’s class bivalvia?

Clams, oysters,etc.. the shell of a bivalve is composed of calcium carbonate and consists of two similar parts called valves.

What are the function of adductor muscles?

Keeps valves closed. There are no apposing muscles for opening the shell.

What’s the function of muscular foot?

For locomotion and burrowing in sand or mud.

How does ingestion occur in clams?

The incurrent siphon contracts bringing in H2o and plankton, through the mantle cavity to gills.

How does digestion occur in clams?

Food moves down esophagus into the stomach.

Digestive enzymes are produced and secrete into the stomach and chemically break down foods.

Digested nutrients leave the stomach and enter the intestine where they diffuse across the gastrodermis.

How does elimination occur in clams?

Undigested food wastes pass into the rectum and out the anus and into the mantle cavity, where they exit via the excurrent siphon.

What type of circulatory system do clams have?

Open circulatory system.

Consists of a heart, blood vessels and sinuses.

How do clams circulate?

Nutrients and O2 in the blood are pumped by the heart, through blood vessels, and into sinuses.

Body tissues and organs ate bathed in blood of the sinus and there is an exchange of nutrients, N-wastes and gases.

How do clams go through respiration?

Water and O2 enter through the incurrent siphon and travel over the gills.

O2 is removed by the gills and diffuses into blood vessels and CO2 diffuses out of the blood into the gills and out into water, exits via the excurrent siphon.

How do clams go through excretion?

2 kidneys filter N-wastes and excess h2o from the blood and fluid from the coelomic cavity surrounding the heart.

waste is deposited into the mantle cavity and leaves via excurrent siphon.

What are a clams nervous system?

They have a less complex nervous system then most other molluscs.

Have no brain; the nervous system consists of a nerve network and a series of paired ganglia.

What are ganglia?

A cluster of nerve cell bodies.

How to clams move?

The pressure of the fluid in the coelom and the action of the surrounding muscles are used to change an organisms shape and make them move.

How do clams reproduce?

They are dioecious (separate sexes)

They produce many gametes which are released into the water from the excurrent siphon.

External fertilization produces a zygote which develops into a free swimming larvae, and into a clam.

What are some characteristics of Cephalopods?

Highly advanced marine animals.

Have arms and tentacles (8 or 10 in most forms and 90 in Nautilus)

Have highly developed senses and brains, expect for nautilus (has acute vision).

Most have colour pigment cells (chromatophores) for camouflage. Can also change texture of skin using papillae.

What type of circulatory system do cephalopods have?

Have 3 hearts and a closed circulatory system.

Blood is confined to the heart and blood vessels at all times.

What is jet propulsion in cephalopods?

The typical way of swimming fast.

Water is sucked in under the mantle collar and then squeezed out the siphon.

What are more characteristics of cephalopods?

Squids have a reduced internal shell called a pen, It offers support to the mantle.

Octopuses lack a shell.

Cephalopods also have a radula used for feeding purposes.

Have jaws for grasping and tearing prey.

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Phylum Mollusca Quiz Set - Mollusks

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Description

Use this set of 2 printable or digital daily quizzes in a unit on the Phylum Mollusca to keep your students studying in the days leading up to the unit exam. Each quiz is 2 pages in length, and includes fill in the blank and short answer questions. A 5-page Teacher Guide and Answer Key is also included. While these are perfect for daily quizzes, they can also be used as homework assignments, classwork, or study guides for your unit test.

Both printable and digital versions of this resource are included. The student handouts can be printed or used in the paperless digital format in your Google Drive, Google Classroom, Microsoft OneDrive, or similar. This resource is perfect for traditional classroom settings, 1:1 schools, or for distance learning.

What is included in your download folder?

• Printable and Editable Quizzes (Set of 2 Quizzes)
• Digital paperless versions (not editable) for use in Google Drive, Google Classroom, and/or Microsoft OneDrive
• Quiz Teacher Guide and Answer Key
• Teacher Guide for Google Apps

These quizzes were written to accompany my " Phylum Mollusca PowerPoint and Notes Set " , but can easily and appropriately be used with any unit on the phylum Mollusca.

Topics Covered by Each Quiz:

• Characteristics of the Phylum Mollusca.
• Mollusks are coelomates: Includes the definition of “coelom”, the advantages of having a true coelom, and a list of animal phyla that have a true coelom. Students are reminded of the differences between acoelomates, pseudocoelomates, and coelomates.
• The trochophore larva.
• Bilateral symmetry.
• The Mollusk Body Plan: Head, foot, visceral hump, mantle, shell, gills, radula.
• Three classes of mollusks: Class Gastropoda, Class Bivalvia, and Class Cephalopoda.
• Class Gastropoda: Characteristics of the members of this class, torsion, the open circulatory system, hemolymph, hemocoel, characteristics of snails, slugs, and nudibranchs.
• Class Bivalvia: Characteristics of the members of this class, the parts of the bivalve shell, adductor muscles.
• Students will label a drawing showing the external structures of the clam: Umbo, hinge, siphons, valves, growth rings, and foot.
• Students will label a drawing showing the internal structures of the clam: Mantle, foot, dorsal excurrent siphon, ventral incurrent siphon, palps, mouth, stomach, digestive gland, intestine, anus, anterior and posterior adductor muscles, heart, gills, and gonads.
• Class Bivalvia Body Systems: Movement, Food-getting and Digestion, Nervous system, Open Circulatory system, Reproductive system, Respiratory system.
• Class Cephalopoda: Characteristics of the members of this class, division of the foot into tentacles, predatory lifestyle, chromatophores.
• Cephalopod body systems: Closed Circulatory system, Nervous system, Reproductive system.
• Characteristics of squid, octopus, and chambered nautilus.
• The Ecology of the Mollusks: What roles do mollusks play in the ecosystem?

You will receive editable documents that are ready to be copied and passed out to your students. All answers included.

Related Resources Include:

Phylum Mollusca Jeopardy Review Game

Phylum Mollusca Task Cards

Mollusca and Annelida Warm Ups and Interactive Notebook Pages

Phylum Mollusca Homework / Study Guides Set of 2

Phylum Mollusca Acrostic Puzzle

Phylum Mollusca Test

Phylum Mollusca Powerpoint Presentation

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