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Why can a useful trait increase rapidly in a population only when it helps both survival and reproduction?

Answer and explanation

Correct answer: A trait spreads only when organisms survive and produce offspring.

Natural selection changes trait frequencies through differential reproductive success. A useful trait may help an organism avoid predators, obtain food or tolerate conditions, which supports survival. However, the trait can become more common only if the surviving organism reproduces and passes the relevant heritable information to offspring. Survival without reproduction does not increase the next generation’s frequency, and reproduction without survival cannot occur. Therefore option A correctly combines both requirements.

Related tags

Natural-SelectionSurvivalReproductionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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