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Why are both survival and reproduction necessary for a useful trait to increase rapidly in a population?

Answer and explanation

Correct answer: Only surviving organisms can produce more offspring and pass the trait ahead

The governing concept is natural selection acting through differential survival and reproduction. Survival allows an organism carrying a useful heritable trait to remain alive, but reproduction is needed to copy and transmit that trait to offspring. If those offspring also survive and reproduce, the trait can increase in frequency across generations. Thus option A is correct; survival alone cannot spread a trait without descendants.

Related tags

SurvivalReproductionNatural-SelectionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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