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Why does natural selection not instantly create a new trait according to an organism's need?

Answer and explanation

Correct answer: Because selection acts on already existing variations

The governing concept is natural selection acting on heritable variation. A population already contains differences produced by genetic variation. If an existing difference helps survival or reproduction, individuals carrying it may leave more offspring, so that trait can become more common over generations. Selection changes the frequency of available traits; it does not consciously design or instantly manufacture a trait because an organism needs it. Therefore option A is correct, while B and C are meaningless and D expresses the rejected idea of instant change by need.

Related tags

Natural SelectionVariationEvolutionHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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