Which of the following must exist in a population before natural selection can act upon that population?

قدرتی انتخاب اس آبادی پر عمل کرنے سے پہلے مندرجہ ذیل میں سے کون سا آبادی میں موجود ہونا چاہیے؟

Variation among individuals caused by environmental factors
Sexual reproduction
Genetic variation among individuals
None of these

Answer: Genetic variation among individuals

Explanation

For natural selection to occur, there must be genetic variation in traits within a population, as this variation provides the raw material for selection.

Natural selection acts on these genetic differences, favoring individuals with advantageous traits for survival and reproduction.

Which of the following must exist in a population before natural selection can act upon that population?

Explanation

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