Write a brief note on homologous organs.

1.	Write a brief note on homologous organs.
Answer» 1. Homologous organs are the organs which perform different functions but have similar structure and origin. 2. For example forelimb of a whale (swimmer), bat (flyer), horse (runner), mole (digger) and man (grasping). 3. If we carefully observe the anatomy of all these animals, they have a common pattern in the arrangement of bones. 4. Even though their external form and functions are different, they are similar internally. 5. Thus it indicates that all the vertebrates have evolved from a common ancestor.

Answer»

1. Homologous organs are the organs which perform different functions but have similar structure and origin.

2. For example forelimb of a whale (swimmer), bat (flyer), horse (runner), mole (digger) and man (grasping).

3. If we carefully observe the anatomy of all these animals, they have a common pattern in the arrangement of bones.

4. Even though their external form and functions are different, they are similar internally.

5. Thus it indicates that all the vertebrates have evolved from a common ancestor.

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