Final answer:
The wings of a housefly and a bat serve similar functions but are analogous structures; they do not share a common ancestor and evolved independently.
Step-by-step explanation:
The wings of the housefly and the bat are an example of convergent evolution. While both serve the same function—that is, flight—the structures are fundamentally different because their evolutionary paths diverged. The housefly's wings are not made of bones and are thus different in structure and embryonic origin from the wings of the bat, which have bones and are similar to the human hand. Therefore, the correct statement regarding the wings of a housefly and a bat is that they are analogous structures, sharing function but not common ancestry.