Question

the three illustrations show anatomical structures of three different organisms. based on your understanding of anatomical homologies, which organisms most likely have a recent common ancestor? a 1 and 2 b 1 and 3 c 2 and 3

Explanation:

Homologous structures are anatomical features in different organisms that share a common ancestry, even if their functions differ. In the given illustrations, 1 (bat wing) and 3 (human arm) are homologous. Both have a similar bone - structure (humerus, radius, ulna, carpals, metacarpals, phalanges) inherited from a common vertebrate ancestor. Structure 2 (insect wing) is an analogous structure as it evolved independently for flight and has a different evolutionary origin.

Answer:

B. 1 and 3