The forelimb of a whale, a bat and a human have the same arrangement of bones but perform different functions. Such organs are described as

Explanation

Homologous organs share a common structural plan and a common embryonic origin because they were inherited from a shared ancestor, and their different uses are the result of divergent evolution. Analogous organs are the opposite case: same job, different structure and origin. Vestigial organs are reduced remnants that have lost their original function altogether.