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Chapter 32 Review
____ 1 Which characteristic below is shared by plants, fungi, and animals?
A They all have cell walls.
B All are multicellular eukaryotes.
C All release exoenzymes to aid in digestion.
D All have intracellular junctions known as desmosomes.
____ 2 Animals
A
B
C
D
probably evolved from colonial protists. How do animals differ from these protist ancestors?
The protists were autotrophic.
Animals are able to reproduce.
The protists were heterotrophic.
Animals have more specialized cells.
____ 3 During the development of most animals, cleavage leads to
A fertilization.
B metamorphosis.
C the formation of a blastula.
D the formation of a gastrula.
____ 4 Which example below is a common feature of all animals?
A true tissues
B bilateral symmetry
C limited to sexual reproduction
D a homeobox-containing family of genes called Hox genes
____ 5 Which example below is NOT a current hypothesis regarding the Cambrian explosion?
A Predator-prey relationships led to diversity through natural selection.
B Evolution of the Hox gene complex provided developmental flexibility.
C A rise in atmospheric oxygen led to success of large animals with high metabolic rates.
D An increase in atmospheric CO2 led to an explosion of plants and life-forms that fed on them.
____ 6 Symmetry is one of the most basic characteristics of animals. The group that has a different symmetry from the other
three groups listed here is the
A annelids.
B molluscs.
C cnidarians.
D arthropods.
____ 7 Which of the following is associated with bilateral symmetry?
A cephalization
B no mesoderm
C a sessile lifestyle
D a lack of true tissues
____ 8 Unlike other animals, sponges
A are unicellular.
B lack true tissues.
C possess cell walls.
D exhibit bilateral symmetry.
____ 9 Ectoderm can give rise to _____; mesoderm can give rise to _____; endoderm can give rise to _____.
A the central nervous system ... muscle ... the lining of the digestive tube
B muscle ... the outer covering of the animal ... the central nervous system
C the lining of the digestive tract ... muscle ... the outer covering of the animal
D the central nervous system ... the outer covering of the animal ... the lining of the digestive tube
____ 10 All animals with bilateral symmetry have _____ germ tissue layer(s).
A one
B two
C three
D four
____ 11 Cnidarians are diploblastic animals. That means which of the following is NOT a characteristic of cnidarians?
A ectoderm
B mesoderm
C gastrovascular cavity
D a lack of true tissues
____ 12 A "true
A
B
C
D
coelom" is a body cavity lined with mesoderm. The presence of a coelom is advantageous because
it allows for a third embryonic germ layer.
it is necessary for a complete digestive tract.
it permits the development of an open circulatory system.
it allows room for the development and movement of internal organs.
____ 13 The difference between pseudocoelomates and coelomates is that pseudocoelomates _____, whereas coelomates
_____.
A are protostomes ... are deuterostomes
B do not have a body cavity ... have a body cavity
C exhibit radial symmetry ... exhibit bilateral symmetry
D have a body cavity partially lined with tissue derived from mesoderm ... have a body cavity completely lined
with tissue derived from mesoderm
____ 14 Which
A
B
C
D
of the following is NOT a difference between protostomes and deuterostomes?
the fate of the blastopore
the presence of a body cavity
the cleavage plane of the embryo
the timing of the determination of embryonic cells
____ 15 In the text you studied two phylogenetic hypotheses regarding the relationships of the animal phyla. The tree that
is based on molecular evidence differs from the tree based on morphological evidence in that it
A depicts sponges as basal animals.
B divides protostomes into two taxa.
C depicts cnidarians as basal eumetazoans.
D suggests that the animal clade is polyphyletic.