Question

Comparing organisms' DNA can show?

Answer 1

Comparing the DNA of two organisms can show how closely related two species are in terms of their evolutionary history (i.e. sharing a common ancestor).

Answer 2

Can tell us how closely they are evolutionarily related.

Step-by-step explanation:

Comparing the DNA of two organisms can tell us how closely they are evolutionarily related.

This system of comparison revolutionized what was previously thought. When species were related only by their physical appearance. While it was not bad at all, the comparison of genetic information yields much more accurate results.