During which of these eras were dinosaurs dominant?

A) Mesozoic B) Cenozoic C) Precambrian D) Paleozoic


Answer: A

Biology & Microbiology

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A bacterial cell must have ___________ in order to transfer portions of its chromosome to another cell.

A. an F factor B. a high frequency of combination plasmid C. a recombination factor D. growth enhancement genes E. all of these components

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Most intertidal chitons are considered

a. grazers. b. predators. c. scavengers. d. filter feeders. e. infauna.

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The enzyme that forms a transport channel in the inner membrane of the mitochondria and uses the potential energy of the proton gradient to form ATP is the

A. FADH2 synthase. B. hydrogen synthase. C. NADH synthase. D. ADP synthase. E. ATP synthase.

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All of the following are sources of environmental damage in desert biomes except:a

people driving across the desert in four-wheel drive vehicles b. poaching c. irrigation of desert soils d. increased groundwater consumption by desert cities e. aquifer buildup

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