EVOLUTION
EVIDENCE FOR EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Two species that have the same DNA provide evidence that evolution has taken place.
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Two species with very similar DNA likely evolved from a common ancestor.
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Each living species has DNA made from different ingredients, showing that organisms have evolved.
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DNA from related species is identical, providing evidence that all organisms have evolved in the same way.
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Detailed explanation-1: -DNA from related species is identical providing evidence that all organisms have evolved in the same way.
Detailed explanation-2: -If two species have the same DNA sequence in their genes, this indicates that they are sharing a common ancestor.
Detailed explanation-3: -DNA evidence for evolution Biologists often compare the sequences of related (or homologous) genes. If two species have the “same” gene, it is because they inherited it from a common ancestor. In general, the more DNA differences in homologous genes between two species, the more distantly the species are related.
Detailed explanation-4: -That’s because closely related species most likely diverged from one another fairly recently in the evolutionary span. Thus, they haven’t had as much time to accumulate random mutations in their genetic codes.
Detailed explanation-5: -Similar anatomy found in different species may be homologous (shared due to ancestry) or analogous (shared due to similar selective pressures). Molecular similarities provide evidence for the shared ancestry of life. DNA sequence comparisons can show how different species are related.