One secondary spermatocyte ultimately produces ____ mature sperm
a. 1
b. 2
c. 3
d. 4
e. 8
B
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Hantavirus pulmonary syndrome is a viral respiratory disease caused by contact with
A) rat fleas. B) rodents. C) mosquitoes. D) bats.
Which pathway shows the correct path of electron transfer from a molecule of NADH?
A. NADH hydrogenase ? ubiquinone ? cytochrome oxidase ? cytochrome b-c1 ? cytochrome c ? O2 B. NADH hydrogenase ? ubiquinone ? cytochrome c ? cytochrome b-c1? cytochrome oxidase ? O2 C. ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? NADH hydrogenase ? O2 D. NADH hydrogenase ? ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? O2 E. ubiquinone ? cytochrome b-c1? cytochrome c ? NADH hydrogenase ? cytochrome oxidase ? O2
Communal courting areas are called
A. leks. B. mating structures. C. resource areas. D. arenas. E. None of these choices are correct.
A small area more or less landlocked is called:
a. the seven seas. b. a world ocean. c. an ocean. d. a sea. e. a marine province.