Question

The wing of bat is said to be homologous to the wing of a bird and analogous to the wing of an insect.

Answer 1

The wing of a bat is said to be homologous to the wing of a bird because both wings have a similar basic structural plan and embryonic origin, even though they perform the same function,flying. Both have the same arrangement of bones (humerus, radius, ulna, carpals, metacarpals, and phalanges), which are modified and adapted for flight. This similarity in structure despite different species indicates common ancestry and divergent evolution.

In contrast, the wing of a bat is analogous to the wing of an insect because, although both are used for flying, they differ entirely in their anatomical structure and developmental origin. Insect wings are extensions of the exoskeleton, made of chitin, and lack bones, while bat wings have a skeletal framework with muscles and skin. This similarity in function due to adaptation to similar environmental demands is called analogy and results from convergent evolution.