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Question

Consider the following examples:

1. Wings of a bat.

2. Flippers of a whale.

3. Wings of a butterfly.

4. Limbs of a human.

Which of the following are homologous organs?


A
1, 2 and 3
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B
1, 2 and 4
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C
1, 2, 3 and 4
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D
1 and 2
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Solution

The correct option is A 1, 2 and 4
Homologous organs are those that have similar internal structure but perform different functions. Wings of a bat, flippers of whale and limbs of human beings are all homologous to each other as they have a common origin, hence similar internal structure (bones that comprise them). On the other hand, wings of a butterfly perform a similar function but do not have the same common origin as the other organs listed and hence is not homologous to them. They are analogous organs.


Biology

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