Homologous organs are organs that have similar structures but may have different functions. These organs share a common evolutionary origin, even though they may serve different purposes in different species. For example, the forelimbs of humans, bats, and whales are structurally similar but have different functions—human arms, bat wings, and whale flippers serve different roles despite having similar bone structures.
Thus, the correct answer is:
(2) Similar in structure and different in functions.
Homologous organs share a similar structure due to a common ancestry but may have different functions in various organisms. An example is the forelimbs of humans and wings of bats, which are structurally similar but serve different purposes.
List-I (Words) | List-II (Definitions) |
(A) Theocracy | (I) One who keeps drugs for sale and puts up prescriptions |
(B) Megalomania | (II) One who collects and studies objects or artistic works from the distant past |
(C) Apothecary | (III) A government by divine guidance or religious leaders |
(D) Antiquarian | (IV) A morbid delusion of one’s power, importance or godliness |