Question

question 6 of 10
which is a homologous structure to the human forearm?
a. the backbone of an ape
b. the tail of a rat
c. the wing of a bat
d. the skull of a beaver

Explanation:

Homologous structures are anatomical features in different organisms that share a common evolutionary origin. The human forearm and the wing of a bat have a similar bone structure (humerus, radius, ulna, carpals, metacarpals, phalanges) due to common ancestry, even though their functions (grasping for humans, flying for bats) are different. The backbone of an ape is a general skeletal element not specifically homologous in the same way as the forearm - wing comparison here. The tail of a rat and the skull of a beaver have no such homologous relationship to the human forearm in terms of the skeletal structure pattern relevant to homology as described.

Answer:

C. The wing of a bat