Where Did We Come From?
Chapter 11, Problem 10
Which of the following taxonomic levels contains organisms that share the most recent common ancestor? a. family; b. order; c. phylum; d. genus; e. class
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Textbook Question
Marsupial mammals give birth to young that complete their development in a pouch on the mother's abdomen. All the native mammals of Australia are marsupials, while these types of mammals are absent or uncommon on other continents. This observation is an example of a.developmental evidence for evolution;
b. biogeographic evidence for evolution;
c. genetic evidence for evolution;
d. fossil evidence for evolution;
e. not useful evidence for evolution
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Textbook Question
Even though marsupial mammals give birth to live young, an eggshell forms briefly early in their development. This is evidence that a.marsupials share a common ancestor with some egg-laying species;
b. marsupials are not really mammals;
c. all animals arose from a common ancestor;
d. marsupial mammals were separately created by God;
e. the fossil record of marsupial mammals is incorrect
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Textbook Question
A species of crayfish that lives in caves produces eyestalks like its above-ground relatives, but has no eyes. Eyestalks in cave-dwelling crayfish are thus .
a. an evolutionary error;
b. a dominant mutation;
c. biogeographical evidence of evolution;
d. a vestigial trait;
e. evidence that evolutionary theory may be incorrect
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