Why can we not say that the human hand and a bird wing have the same function just because they are homologous?
Answer and explanation
Correct answer: Homology indicates similarity in basic structure, not necessarily the same function.
Homologous organs are identified by a common basic structural plan and evolutionary origin, not by identical present-day use. The bones of the human forelimb and bird forelimb correspond in arrangement, but natural selection has modified them for different functions. A human hand is mainly adapted for grasping and manipulation, whereas a bird wing is adapted for flight. Therefore option A is correct; homology does not require functional identity.
Frequently asked questions
What is the correct answer to this question?
Homology indicates similarity in basic structure, not necessarily the same function.
Why is this the correct answer?
Homologous organs are identified by a common basic structural plan and evolutionary origin, not by identical present-day use. The bones of the human forelimb and bird forelimb correspond in arrangement, but natural selection has modified them for different functions. A human hand is mainly adapted for grasping and manipulation, whereas a bird wing is adapted for flight. Therefore option A is correct; homology does not require functional identity.
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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