Which example best shows the relation between homologous organs and evolution in different directions?
Answer and explanation
Correct answer: Human arm and whale forelimb have different functions but a similar basic plan
The governing concept is homology and divergent evolution. Homologous organs share a basic structural plan because of common ancestry, but they may perform different functions after adapting to different environments. The human arm and whale forelimb illustrate this clearly: their bones correspond, although one is suited for grasping and the other for swimming. Bird and insect wings are analogous, not homologous, while acquired muscles are not inherited.
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What is the correct answer to this question?
Human arm and whale forelimb have different functions but a similar basic plan
Why is this the correct answer?
The governing concept is homology and divergent evolution. Homologous organs share a basic structural plan because of common ancestry, but they may perform different functions after adapting to different environments. The human arm and whale forelimb illustrate this clearly: their bones correspond, although one is suited for grasping and the other for swimming. Bird and insect wings are analogous, not homologous, while acquired muscles are not inherited.
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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