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Answer: B

1) A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?

A) genes involved in chitin synthesis

B) collagen genes

C)β-catenin genes

D) genes involved in eye-lens synthesis

Front

2) Which of the following is (are) unique to animals?

A) the structural carbohydrate, chitin

B) nervous system signal conduction and muscular movement

C) heterotrophy

D) flagellated gametes

Front

3) The larvae of some insects are merely small versions of the adult, whereas the larvae of other insects look completely different from adults, eat different foods, and may live in different habitats. Which of the following is most directly involved in the evolution of these variations in metamorphosis?
A) artificial selection of sexually immature forms of insects
B) changes in the homeobox genes governing early development
C) the evolution of meiosis
D) the origin of a brain

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