Question

Sol.(b) [Key Concept: Homologous Forelimbs — Common Ancestry] The bones of forelimbs of whale, bat, cheetah, and man are similar in structure (pentadactyl limb) because they share a common ancestor. These are homologous organs that have different functions across diverse forms but are developed along the same anatomical plan. These organs arise due to divergent evolution from a common vertebrate ancestor.