A scientific variable is any factor that can be changed or controlled
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A nucleus and a cell membrane.
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Answer:
2 or 1 pretty sure its one ur welcome bestie
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Answer:
C. The number of differences in a specific DNA sequence of two species is multiplied by a known mutation rate to determine the number of years of evolution that separate the two species.
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This is the best explanation of a way that a molecular clock can be used!
