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How does natural selection explain how populations can change?

User Aerique
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Answer:

Natural selection can cause microevolution, or a change in allele frequencies over time, with fitness-increasing alleles becoming more common in the population over generations. fitness is the definition of how successful production is.

User Thach Huynh
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Answer:

Natural selection can cause microevolution (change in allele frequencies), with fitness-increasing alleles becoming more common in the population.

Step-by-step explanation:

User Circusbred
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