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22-01-2020
Biology

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Genetic variation _____. a. must be present in a population b. before natural selection can act upon the population c. arises in response to changes in the environment d. is created by the direct action of natural selection

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22-01-2020

Answer:

B.

Explanation:

This is the change in the amino acid sequence of DNA of an organism.

It is one of mechanisms of Natural selection. Variation makes some organism to develop selective advantages over others in the same population. Therefore they have resistance to selection pressure and more natural selected above others organisms in the same population

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