Which must be true for natural selection to happen?

A.) There must be genetic variation in the population.
B.) There can be no competition for resources
C.) All organisms must reproduce the same amount.
D.) The population must be below carrying capacity.

Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.

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Which must be true for natural selection to happen? A.) There must be genetic variation in the population. B.) There can be no competition for resources C.) All organisms must reproduce the same amount. D.) The population must be below carrying capacity.

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Which must be true for natural selection to happen?

A.) There must be genetic variation in the population.
B.) There can be no competition for resources
C.) All organisms must reproduce the same amount.
D.) The population must be below carrying capacity.