Which example shows the combined effect of heritable variation and natural selection?
Answer and explanation
Correct answer: Dark-coloured insects survive better in polluted areas and leave more offspring
This example illustrates natural selection only when colour differences already occur and are heritable. In a polluted habitat, dark insects may be less visible to predators, so they survive and reproduce more successfully. Their offspring can inherit the colour tendency, causing the trait to become more common over generations. Therefore option A combines variation, differential survival, reproduction, and inheritance. B confuses acquired features with inheritance, while C and D are biologically unrelated.
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What is the correct answer to this question?
Dark-coloured insects survive better in polluted areas and leave more offspring
Why is this the correct answer?
This example illustrates natural selection only when colour differences already occur and are heritable. In a polluted habitat, dark insects may be less visible to predators, so they survive and reproduce more successfully. Their offspring can inherit the colour tendency, causing the trait to become more common over generations. Therefore option A combines variation, differential survival, reproduction, and inheritance. B confuses acquired features with inheritance, while C and D are biologically unrelated.
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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