Chapter 9 Test

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One feature that all mollusks have is that they:

Are soft-bodied

What structure allows a squid to kill its prey?

Beak

Mollusks shells are hard due to the presence of the chemical compound _____.

Calcium Carbonate

The squid and octopus use _____ to avoid being detected by their enemies.

Camouflage

What class do the squid belong to? What does this mean?

Cephalopods, Headed foot

True/False: Christopher Columbus was plagued by whelks.

False

True/False: Deep sea scallops live only at depths of 80 feet or more.

False

True/False: Goose barnacles are mollusks.

False

True/False: Horse conchs can grow to 2 feet long.

False

True/False: Oysters were not known to be edible until the 1800's.

False

True/False: Squid have 6 arms and 2 tentacles.

False

True/False: The 2 lungs in the squid were feathery in appearance.

False

True/False: The movie "20,000 Leagues Under the Sea" was about the Giant Octopus.

False

The term cephalopod means _____.

Headed foot

Oxygen and food are taken in through clam's _____.

Incurrent siphon

What is the purpose of a squid squirting out ink?

It's a distraction/confuse predators

A membrane called the _____ lines the inside of bivalve shells.

Mantle

Clamshells with a telltale hole have been preyed upon by the _____.

Moon Snail

A gastropod shell's opening is covered by a thick pad of tissue called the _____ that closes like a trapdoor over its foot.

Operculum

The term gastropod means _____.

Stomach footed

Why do squid and octopus have camouflage for protection whereas the bivalves and gastropods do not?

The bivalves and gastropods have hard shells to protect them

What is the function of the byssal threads pictured below in a bivalve?

They are attaching to a rock so it does not get taken away by a wave.

True/False: All mollusks have bilateral symmetry.

True

True/False: Fish live within the shell of the Queen conch.

True

True/False: Giant Squid are the largest invertebrates.

True

True/False: Jumping on the sand causes some clams to squirt up water.

True

True/False: Most snail shells have their openings on the right.

True

True/False: Most squid die after mating.

True

True/False: Red tide causes paralytic shellfish poisoning.

True

True/False: Squid have 3 hearts, 2 brachial and 1 systemic.

True

True/False: The tissue that was cut to open up the squid is called the mantle.

True

The term bivalves means ______.

Two shells

All of the following live mostly in or on a subtrate EXCEPT the a. Cephalopod b. Mussel c. Scaphopod d. Cone Snail

a. Cephalopod

Which of the following is a bivalve mollusk? a. Oyster b. Snail c. Whelk d. Nautilus

a. Oyster

Of the following mollusks, which one is LEAST related to the others? a. Snail b. Scallop c. Mussel d. Clam

a. Snail

Snail Picture: What is the function of the structures on top of its head? a. Vision b. Defense c. Respiration d. Food getting

a. Vision

What characteristics do the 2 mollusks shown here have in common? Both... a. Are filter feeders b. Are soft-bodied c. Have stinging tentacles d. Have external shells e. All of the above

b. Are soft-bodied

All of the following are cephalopods EXCEPT a. Octopus b. Chiton c. Squid d. Nautilus

b. Chiton

A filter feeding mollusk is the a. Moon Snail b. Mussel c. Mud Snail d. Whelk

b. Mussel

The gastropod that lacks a shell is a. Cuttlefish b. Nudibranch c. Nautilus d. Squid

b. Nudibranch

Snail Picture: The molusk shown here would be classified as a a. Bivalve b. Univalve c. Pelecypod d. Cephalopod

b. Univalve

The class of mollusks that contains many species without shells is a. Bivalves b. Scaphopods c. Cephalopods d. Chitins

c. Cephalopods

A snail closes its shell by opening with a pad of tissue called the a. Shell b. Foot c. Operculum d. Mantle

c. Operculum

All of the following are gastropods EXCEPT the a. Slipper Shell b. Limpet c. Scallop d. Moon Snail

c. Scallop

The structure in a clam that secretes the shell is the a. Siphon b. Foot c. Gills d. Mantle

d. Mantle

An example of a univalve mollusk is the a. Clam b. Mussel c. Scallop d. Snail

d. Snail


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