Bird wings and insect wings perform similar functions; yet why are they not homologous?
Answer and explanation
Correct answer: Their basic structure and origin are different
Homologous organs share an underlying structural plan because of common ancestry, whereas analogous organs only share a function. Bird wings are modified vertebrate forelimbs with bones, while insect wings are extensions of the insect body wall and have a different origin and construction. Thus option A is correct. Options B, C, and D merely describe similarities that do not establish homology; similar function is precisely why they are called analogous.
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What is the correct answer to this question?
Their basic structure and origin are different
Why is this the correct answer?
Homologous organs share an underlying structural plan because of common ancestry, whereas analogous organs only share a function. Bird wings are modified vertebrate forelimbs with bones, while insect wings are extensions of the insect body wall and have a different origin and construction. Thus option A is correct. Options B, C, and D merely describe similarities that do not establish homology; similar function is precisely why they are called analogous.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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