An example of a homologous organ is represented best by which of the following?

Explanation

Birds and humans both are vertebrates. Both share a common ancestor and have a similar embryonic origin. Both organisms are examples of divergent evolution. 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. Although both the wing and arm are morphologically different and perform different functions anatomically they resemble each other. They show similarities in the pattern of the bones of the forelimbs. They have the same set of bones i.e. humerus, radius, ulna, and phalanges. This is because genetically, both these structures originate from the same structure of the last common ancestor.