Homologous organs in the evolved organisms serve as the source of evidence for biological evolution.
These organs show that there are relationships between different organisms from the time of their origin with little changes.
Homologous organs:
The organs found in different organisms which have a common origin and same basic structure but differ in the functions they carry out are called homologous organs.
Examples of homologous organs include the forelimbs of a man, the forelimbs of a cat, the flippers of a whale, and the wings of a bat.
These structures have the same origin and basic structure but differ in the functions they perform.
The forelimbs of a man are used for grasping, the cat uses the forelimbs for running, the whale uses its flippers for swimming and the bat uses its wings for flying.