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Multiple Choice Quiz
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1

The traditional animal family tree places more significance on body plan (the presence of a coelom) while the rRNA tree places more significance on
A)embryological development patterns.
B)whether or not the animal molts.
C)symmetry.
D)all of these.
2

A key evolutionary development seen for the first time in the sponges is
A)a complete digestive system.
B)tissues.
C)body symmetry.
D)multicellularity.
3

All of the following are found in sponges except
A)spicules.
B)choanocytes.
C)a digestive tract.
D)sexual and/or asexual reproduction.
4

The first animal group to show extracellular digestion was the
A)sponges
B)cnidarians.
C)flatworms.
D)roundworms.
5

Cnidarians project a nematocyst to capture their prey by
A)building up a high internal osmotic pressure.
B)ejecting it with a jet of water.
C)using a springlike apparatus.
D)muscle contractions that "throw" the nematocyst.
6

Which of the following is an example of an organism with the medusa body form?
A)a hydra
B)a coral
C)an anemone
D)a jellyfish
7

Key evolutionary advances of the flatworms are bilateral symmetry and
A)a coelom.
B)internal organs.
C)a one-way digestive tract.
D)a body cavity.
8

For excretion, flatworms use
A)miracidium.
B)osmosis.
C)flame cells.
D)proglottids.
9

The type of body cavity seen in the roundworms is called a(n)
A)coelom.
B)acoelom.
C)pseudocoelom.
D)gastrovascular cavity.
10

The type of pseudocoelomates found in soil, freshwater and marine environments, and as parasites are
A)nematodes.
B)Trichinella.
C)rotifers.
D)Cycliophora.







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