Physics, 26.08.2019 04:30, ChaosMind

Which best describes how dna is used as a molecular clock?
the number of mutations in dna is compared between two species.
the total amount of dna is compared between two species.
the percent of carbon in dna is compared between parent and offspring.< the total mass of dna is compared between parent and offspring.

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Which best describes how dna is used as a molecular clock?
the number of mutations in dna is...