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10 Cards in this Set
- Front
- Back
Looking back through time, one can see that all organisms are related. At branch points in the animal family tree one can see where mutations gave rise to
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changes in body plan, biochemistry, and behavior
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An animal with bilateral symmetry
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has left and right sides and usually displays cephalization
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Which statement most accurately describes incomplete metamorphosis?
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alterations in body plan take place a bit at a time, forming larger and larger nymphs
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Major trends in the evolution of animals include
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all of these
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Which of the following processes are thought to have contributed to adaptive radiation of animals during the Cambrian period?
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the first predators arose, the supercontinents were breaking up and oxygen levels were rising in the atmosphere
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The most successful of the invertebrate groups with respect to the numbers of species is
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Arthropoda
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_____ are the most diverse animal phylum and _____ are the most diverse animals in this phylum.
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antropods; insects
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The vast majority of animals are
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invertebrates
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The protist that is most closely related to animals is the
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choanoflagellate
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All animals are
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multicellular and heterotrophic, and lack cell walls
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