Question

Structures as different as horse hooves, bat wings, and whale flippers contain pentadactyl bones that develop from the same embryonic tissues. How have evolutionary biologists interpreted these similarities?

a) By proposing that horses, bats, and whales share a common ancestor.

b) By identifying the bones as being analogous structures.

c) By applying the principle of convergent evolution.

d) Two of the other statements are correct

Please help

Answer 1

Answer: Structures as different as horse hooves, bat wings, and whale flippers contain pentadactyl bones that develop from the same embryonic tissues. This has been interpreted by the evolutionary biologists by proposing that all of them share a common ancestary. The presence of penyadactyl limb is a sign of homology in the pre-Darwinian sense. The presence of homology in the limbs suggest that they share a common ancestry and thus, the correct option is A.