Biology

The correct answer is: D.Changes in allele frequencies

Explanation:

The Hardy-Weinberg equilibrium is used to measure whether allele frequencies in a population are stable over time. If the allele frequencies remain unchanged, it suggests that the population is not evolving and is in genetic equilibrium. However, if the allele frequencies change, it indicates that evolutionary forces (like natural selection, genetic drift, mutation, migration, or non-random mating) are at work.

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