Testosterone
a. stimulates spermatogenesis.
b. promotes the normal development and
maintenance of sexual behavior.
c. is responsible for the development of male
secondary sexual characteristics.
d. is responsible for the development of the male
genitalia.
e. does all of these.
Answer: e
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Denitrification ____
a. converts ammonium to nitrates b. reduces nitrates to nitrites c. reduces ammonia to ammonium d. converts atmospheric nitrogen to ammonia e. converts nitrates to nitrogen gas
A species' numbers are so severely reduced that it is in imminent danger of extinction throughout all or a significant
part of its range. This species would be considered:a. extinct. b. extant. c. endangered. d. threatened. e. endemic.
All of the following are components of peptidoglycan EXCEPT
a. N-acetylglucosamine b. N-acetylmutamic acid c. lipopolysaccharide d. amino acids e. peptide cross-links
The tsetse fly is responsible for the spread of
A. African sleeping sickness. B. Chagas' disease. C. filariasis. D. kala-azar. E. toxoplasmosis.