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The wing of a bat said to be homologous ...

The wing of a bat said to be homologous to the wing of a bird and analogous to the wing of an insect. Why?

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(a) Because wing of bat and bird are modified forelimbs, have same basic pattern of structure. So they are homologous. (b) Wings of bat have entirely different origin and structure. But because they help in flight, they have similar appearance. Hence they are analogous.
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