The effects of mutation in human somatic cells have a low probability of causing harm because only _______ of human DNA encodes gene products.

A. greater than 5 percent
B. less than 2 percent
C. less than 4 percent
D. greater than 8 percent
E. greater than 3 percent


Answer: B

Biology & Microbiology

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The bulk of a plant is made from ________

A) minerals from the soil obtained by the roots of a plant B) sugars from the soil obtained by the roots of a plant C) the sugars made in photosynthesis, which were made from carbon dioxide D) oxygen absorbed by the pores in leaves

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What type of media is used to demonstrate oxygen requirements of microbes?

A. thioglycollate B. blood agar C. sodium chloride D. sulfite polymyxin sulfadiazine

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Thick- skinned rhinoceroses and elephants were once classified together as pachyderms (meaning "thick skin"). They actually descended from different ancestors that in turn evolved from a thin-skinned common ancestor that was not included in the pachyderms. Pachyderms were therefore, as a taxon,

A. monophyletic. B. paraphyletic. C. a kingdom. D. polyphyletic. E. a supergroup.

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