NEET BIOLOGY

Detailed explanation-1: -Organs such as bat’s wing, wings of birds, seal’s flipper, forelimb of a horse, and human arm have a common underlying anatomy that was present in their last common ancestors; therefore their forelimbs are homologous organs.

Detailed explanation-2: -The wing of a bird and the arm of a human are examples of c. homologous structures. This is because they are structures which have a similar evolutionary origin despite the fact that they play different roles.

Detailed explanation-3: -The wing of a bird is a modified forelimb. It is adapted for an aerial mode of living i.e. used for flying. Whereas, the forelimb in humans is called an arm. It is used for various purposes like holding, clutching, lifting, writing, etc.

Detailed explanation-4: -An example of homologous structures are the limbs of humans, cats, whales, and bats. Regardless of whether it is an arm, leg, flipper or wing, these structures are built upon the same bone structure.

Detailed explanation-5: -Its descendants, including whales, lizards, humans, and birds, as well as many others, inherited the tetrapod limb from this ancestor. Structures inherited from a common ancestor are called homologous structures, or homologies.