The more similar the DNA of two species, the more closely related they are. Scientists have used modern DNA analysis to trace the evolutionary relationships among Darwin’s 13 species of finches. DNA analysis revealed that the finch species all had very similar DNA. Thus, Darwin was correct when he proposed that they had evolved from a common ancestor.

Which of the following best explains why DNA analysis provides better evidence to support the hypothesis that Darwin’s finches evolved from a common ancestor than the scientific methods that Darwin used?

C. DNA analysis provides more objective data than observation does.


DNA analysis is more objective than observation, because the person doing the observing must interpret what he or she sees.

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