Chance changes in a gene pool are known as ____

a. artificial selection
b. genetic drift
c. phenotype variations
d. inheritance
e. acquired characteristics


ANSWER: b

Biology & Microbiology

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Penicillin was discovered by

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The total DNA in a cell is referred to as the:a

genome. b. cDNA. c. library. d. chromosomal DNA. e. Human Genome project

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____ is NOT a condition of the Hardy-Weinberg concept. 

A. Random mating B. Lack of mutations C. Small population size D. Lack of migration

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Which of the following is the layer of the meninges that has direct contact with the brain?

A) arachnoid mater B) geezin mater C) pia mater D) dura mater E) dinan mater

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