Chapter 9 Test
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
