Which of the following is mismatched?

A. Cytokinin—inhibits lateral root formation
B. Auxin—promotes cell enlargement
C. Gibberellin—involved in phototropism and gravitropism
D. Abscisic acid—promotes stomatal closure
E. Ethylene—promotes seasonal leaf abscission


Answer: C

Biology & Microbiology

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Examine the figure above. In the continental U.S., the dark green patches show areas with the highest bird species richness. What best explains why these areas have such diversity?



A. These areas have the highest temperatures in the continental U.S.
B. These areas have mountainous terrain.
C. These areas have well-protected natural areas.
D. These areas have low frequencies of extreme weather events and fire.

Biology & Microbiology

____ is a regulatory protein that slows the

production of muscle proteins.

a. Actin b. Myosin c. Troponin d. Testosterone e. Myostatin

Biology & Microbiology

How many different types of chromosomes do humans possess?

A. 22 B. 23 C. 24 D. 42 E. 46

Biology & Microbiology

If glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle?

A) 1/6 B) 1/3 C) 2/3 D) all of it

Biology & Microbiology