What does similar structure but different function in homologous organs indicate?
Answer and explanation
Correct answer: Evolution in different directions from a common ancestor
Homologous organs share a basic structural plan because they were inherited from a common ancestor, but they may perform different functions in different organisms. For example, the forelimbs of humans, whales and bats have corresponding bones adapted for distinct uses. This pattern is called divergent evolution: one ancestral structure becomes modified in different directions. Therefore A is correct; B describes analogous organs more closely, and C and D do not explain the structural relationship.
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What is the correct answer to this question?
Evolution in different directions from a common ancestor
Why is this the correct answer?
Homologous organs share a basic structural plan because they were inherited from a common ancestor, but they may perform different functions in different organisms. For example, the forelimbs of humans, whales and bats have corresponding bones adapted for distinct uses. This pattern is called divergent evolution: one ancestral structure becomes modified in different directions. Therefore A is correct; B describes analogous organs more closely, and C and D do not explain the structural relationship.
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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