Biology, Eighth Edition (Raven)

Chapter 32: Overview of Animal Diversity

Pre Test

1
Which of the following is the most important defining characteristic of an animal? (p .622)
A)multicellularity
B)heterotrophic
C)no cell walls
D)sexual reproduction
E)all are equally important
2
Sponges differ from other animals because: (p. 624)
A)all are aquatic.
B)they lack true tissues and organs.
C)they are asymmetrical.
D)a and b
E)b and c
3
In the traditional classification of animals into groups of phyla, it is assumed that phyla share characters that have arisen only once. (p. 628)
A)True
B)False
4
Recent molecular data has led to a revision of the traditional classification of animal phyla. The annelids and arthropods are now moved into different clades, and the arthropods are now grouped with animals that molt, the: (p. 629)
A)protozoans.
B)ecdysoans.
C)myszostomids.
D)parazoa.
E)artherozoa.
5
It is accepted that the animal kingdom is monophyletic. Which hypothesis about the origin of the metazoan is the most strongly supported? (p. 632)
A)the multinucleate hypothesis
B)the polyphyletic hypothesis
C)the colonial flagellate hypothesis
D)the unicellular hypothesis
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