AVertebrate heart
BFlippers of dolphin
CEye of octopus
DWings of butterfly
Answer:
A. Vertebrate heart
Read Explanation:
A homologous organ is one that shares a similar basic structure and origin with another organ in a different species, even if their functions are different. The similarity in structure points to a common ancestor.
The vertebrate heart is an excellent example of a homologous organ. While the hearts of different vertebrates—like fish, amphibians, reptiles, birds, and mammals—vary in complexity and function, they all share a similar underlying developmental plan. For instance, a fish heart has two chambers, an amphibian heart has three, and a bird or mammal heart has four. Despite these differences, their fundamental design of atria and ventricles is evidence of their shared evolutionary origin. This divergence from a common ancestor to adapt to different needs is known as divergent evolution.