If two organisms of different species share more similar DNA sequences with each other than with other species, we can conclude that ________.
A)these two species are not closely related
B)these two species are very closely related
C)these two species happen to share similar DNA by chance
D)there is no relationship between similar DNA and how closely related organisms are

Question

Quizplus · Accepted Answer

If two organisms of different species share more similar DNA sequences with each other than with other species, it indicates that they share a common ancestor and are closely related. The more similar their DNA sequences are, the more recently they diverged from a common ancestor. This is the basis of molecular phylogenetics, which uses DNA sequence data to reconstruct evolutionary relationships among organisms.

If Two Organisms of Different Species Share More Similar DNA