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Which of the following structures is homologous to the wing of a bird?

1. Dorsal fin of a Shark
2. Wing of a Moth
3. Hind limb of Rabbit
4. Flipper of Whale

Correct answer: Flipper of Whale

Solution

A bird wing and a whale flipper are both modified vertebrate forelimbs, so they share a common ancestral structure. Their functions differ, but their underlying anatomical origin is the same, which makes them homologous.

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