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Final answer:
Directional selection favors one end of phenotypic variation in a population due to environmental changes, as seen in the evolution of peppered moths in England during the Industrial Revolution.
Explanation:
Directional selection is a type of natural selection that occurs when environmental changes favor phenotypes at one end of the existing variation spectrum. An example is the evolution of peppered moths in England during the Industrial Revolution, where lighter moths became more visible due to pollution, leading to an increase in the darker melanic form. This type of selection results in a shift in the population's genetic variance towards the favored phenotype.
Learn more about Directional selection in populations here:
https://brainly.com/question/48388641
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