GENERAL ANATOMY
EMBRYOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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have similar structures but may have different functions
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are present in these organisms, but no longer function
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have different structures but the same function
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Detailed explanation-1: -Whales, bats, cheetah and human share similarities in the pattern of bones of forelimbs. Though these forelimbs perform different functions in these animals, they have similar anatomical structure – all of them have humerus, radius, ulna, carpals, metacarpals and phalanges in their forelimbs.
Detailed explanation-2: -The flipper of a whale, the wing of a bat, and the leg of a cat are all very similar to the human arm, with a large upper “arm” bone (the humerus in humans) and a lower part made of two bones, a larger bone on one side (the radius in humans) and a smaller bone on the other side (the ulna).
Detailed explanation-3: -What is a homologous structure? It is an example of an organ or bone with similar underlying anatomical features found in different animals. These structures support the idea that the different animals descend from a common ancestor and serve as evidence of evolution.
Detailed explanation-4: -So, the correct answer is ‘They share a common ancestor’.