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Multiple Choice Quiz
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1

Of the mollusks, snails are in the class of
A)gastropods.
B)bivalves.
C)cephalopods.
D)chitons.
2

A mantle is
A)present only in bivalves.
B)a structure that acts as a lung or contains gills.
C)a rasping, tonguelike organ in mollusks.
D)necessary for mollusks to be motile.
3

Segmentation was first apparent in the
A)flatworms.
B)annelids.
C)mollusks.
D)arthropods.
4

Which of the following is not present in polychaetes?
A)a coelom
B)parapodia
C)permanent gonads
D)setae
5

The lophophore, the structure characteristic of lophophorates,
A)functions in gas exchange.
B)functions in feeding.
C)can be withdrawn when the animal is disturbed.
D)All of these are correct.
6

The phylum that shows the greatest diversity, or the greatest number of species, is
A)Arthropoda.
B)Brachiopoda.
C)Echinodermata.
D)Mollusca.
7

Air for respiration enters the insect body through the
A)tracheae.
B)spiracles.
C)tracheoles.
D)Malpighian tubules.
8

Arthropods shed their old exoskeleton as they grow in a process known as
A)tagmatization.
B)metamorphosis.
C)chrysalis.
D)ecdysis.
9

Which animal group has radial symmetry, a water-vascular system, moves with tube feet, and has an endoskeleton?
A)arachnids
B)crustaceans
C)echinoderms
D)cnidarians
10

The echinoderms that lack distinct arms are the
A)brittle stars.
B)sea urchins.
C)sea stars.
D)Asteroidea.







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