Why is the formation of a useful variation alone not enough for it to spread through a population?
Answer and explanation
Correct answer: It must be inherited and provide a survival or reproductive advantage
For a useful variation to become common, it generally must be heritable so that it can pass to offspring, and it must improve survival or reproductive success under the relevant conditions. Natural selection can then increase its frequency over generations, although chance and population structure also matter. Option A gives the essential requirements. B ignores inheritance and selection, C is false because variations may be beneficial, neutral or harmful, and D contradicts heredity.
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What is the correct answer to this question?
It must be inherited and provide a survival or reproductive advantage
Why is this the correct answer?
For a useful variation to become common, it generally must be heritable so that it can pass to offspring, and it must improve survival or reproductive success under the relevant conditions. Natural selection can then increase its frequency over generations, although chance and population structure also matter. Option A gives the essential requirements. B ignores inheritance and selection, C is false because variations may be beneficial, neutral or harmful, and D contradicts heredity.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Inheritance.
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