Question

Which of the following is a pair of homologous organs?

• A. Pectoral fin of rohu and forelimb of horse
• B. Wings of grasshopper and wings of crow
• C. Lungs of rabbit and gills of rohu
• D. Wings of bat and wings of butterfly.

Answer 1

The correct option is A Pectoral fin of rohu and forelimb of horse

The organs which have the same fundamental structure but different functions are called homologous organs. Pectoral fin of rohu and forelimb of horse have the same fundamental structure, but their functions are different. Pectoral fin is used for swimming by rohu and forelimb is used for walking by horse. The other options are all examples of analogous organs, which are those organs having similar functions but structurally (referring to internal structure) different.