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It is used by every living cell
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Mutations and sexual reproduction increase genetic variation in a population. Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring. ... Individuals may mutate, but natural selection acts by shifting the characteristics of the population as a whole.
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Answer:
Sphenoid bone spans the width of the cranial floor; keystone of the cranium because its central wedge articulates with every other cranial bone. Unlimited access.
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Answer:
Secondary roots are thin and spread outward.
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