What is the function of inhibin?

A. It binds with testosterone and inhibits it.
B. It inhibits the development of male secondary sexual characteristics.
C. It binds with the Sertoli cells and inhibits the production of sperm.
D. It inhibits mitosis.
E. It inhibits the secretion of GnRH.


Answer: E

Biology & Microbiology

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Based on the experiment in the figure above, which of the following are plausible reasons for the result?

I) No nutrients evaporate now that vegetation is absent. II) Nutrients dissolve in the water running through the watershed. III) Nutrients are attached to small particles of sand or clay that leave the watershed. IV) Plant roots that held soil particles in place are no longer there. A) only I and III B) only II and IV C) only I, II, and IV D) only II, III, and IV E) only I, II, and III

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Which was the most likely food source for the first terrestrial tetrapods?

a. leaves b. insects c. small mammals d. worms e. eggs

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What stimulates germination of desert plant seeds after a hard rain?

A) production of auxins B) removal of abscisic acid C) cooler temperatures D) activation of cytokinins

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The most specific name for an incoming monomer about to be incorporated into a DNA chain is ________

A) nucleoside monophosphate B) ribonucleoside diphosphate C) nucleotide D) deoxyribonucleoside E) deoxyribonucleoside triphosphate

Biology & Microbiology