Question

The forelimbs of bats and humans have a very similar bone structure even though they appear very different on the outside

Answer 1

The forelimbs of all mammals are homologous traits, meaning that they originate from a common ancestral trait.

The correct answer is therefore C. Homologies (homologous traits), from the same common ancestor.

(To clarify, we know it is from a common ancestor because both bats and humans are mammals)