Question

Which of the following pairs is analogous to each other?
A. The forelimb of a bird and forelimb of a human
B. Wings of a bird and wings of a bat

Answer 1

Homology refers to similar structures but different functions. On the other hand, analogy refers to dissimilar structures but the same functions. The forelimb of a bird and a human are structurally similar but they differ in their functions. The forelimb of a bird is used for flying, whereas the forelimbs in humans are used for grasping. Therefore, the forelimb of a bird and a human are homologous organs.

The wings of a bat and a bird are used for the same function i.e. for flight. But, they are structurally different. Hence, the wings of a bird and the wings of a bat are analogous to each other.