In which condition can the direction of natural selection change?
Answer and explanation
Correct answer: When the environment changes and different traits become useful.
Natural selection is context-dependent: a trait that is advantageous in one environment may provide little benefit or even become disadvantageous when conditions change. For example, a change in climate, food availability, or predators can alter which variations improve survival and reproduction. Consequently, the direction of selection may shift toward different traits. Option A is correct; identical organisms provide no variation for selection, and without reproduction or chromosomes the proposed process cannot operate normally.
Frequently asked questions
What is the correct answer to this question?
When the environment changes and different traits become useful.
Why is this the correct answer?
Natural selection is context-dependent: a trait that is advantageous in one environment may provide little benefit or even become disadvantageous when conditions change. For example, a change in climate, food availability, or predators can alter which variations improve survival and reproduction. Consequently, the direction of selection may shift toward different traits. Option A is correct; identical organisms provide no variation for selection, and without reproduction or chromosomes the proposed process cannot operate normally.
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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