The nucleotide sequences found in two different species are made of the same base pairs. This is evidence of

The correct answer is - closely related species.

Explanation:

If two species have similar gene sequences or nucleotide sequences with the same base pairs then it means they both are closely related and have diverged from a similar and latest ancestor.

The same gene sequence results in the same proteins that could result in the same phenotypic behavior. Such cases establish that both species are closely related and have recently diverged. These species must have a common ancestor.