According to "evo-devo" thinking, an organism's body form can be substantially changed

A) only through multiple mutations that produce a large number of new proteins.
B) through mutations that change sexually selected traits.
C) only when changes in the environment directly alter the major protein-coding genes in the organism's genome.
D) through mutations or changes in the expression of one or a few genes that regulate development.


Answer: D

Biology & Microbiology

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Which of the following are incorrectly matched?

A. gene A, sepal formation, whorl 1 B. gene B, petal formation, whorl 2 C. gene E petal formation, whorl 2 D. gene C stamen formation, whorl 3 E. gene B carpel formation, whorl 4

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Sieve tube elements are components of the ____

a. ground tissue

b. phloem c. dermal tissue d. meristem e. xylem

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Activity of the two halves of the cerebrum is coordinated by means of the __________ that connects them. Fill in the blank(s) with the appropriate word(s)

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Photophosphorylation during photosynthesis differs from oxidative phosphorylation during cellular respiration in that

A) it involves an electron transport chain. B) energy is stored in the form of a proton (H+) concentration difference. C) generation of ATP is driven by a flow of protons (H+) through ATP synthase. D) the final electron acceptor is NADP+ and not oxygen.

Biology & Microbiology