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CLEP Natural Science - Blogs Sample Questions

The selection that occurs when two extreme phenotypes are fitter than an intermediate phenotype is called known as which of the following?

Correct Answer:

disruptive selection.

the correct answer to the question is disruptive selection. this is a type of natural selection that simultaneously favors individuals at both extremes of the phenotypic range. this is different from directional selection, which shifts the population toward one extreme, and stabilizing selection, which favors the intermediate phenotypes over the extremes.

disruptive selection occurs in environments where the average or intermediate phenotype is less suited to the conditions than either of the extremes. for example, in a habitat with two very different types of available resources, individuals specialized to exploit each type of resource effectively may have a survival advantage, whereas individuals with intermediate traits may not thrive as well, being insufficiently specialized for either resource.

this form of selection can lead to increased genetic variance in a population, as it promotes the survival and reproduction of individuals with distinct, divergent traits. over time, this can potentially result in speciation, particularly if the divergent traits are associated with reproductive isolation of the subgroups.

in summary, disruptive selection, also known as diversifying selection, is a mechanism of evolution that increases the frequency of extreme phenotypes at the expense of intermediate phenotypes. this process contributes to the diversity of forms found in various biological populations, helping species adapt to a wide range of environmental conditions and potentially leading to the formation of new species.

Additional Blogs for CLEP - College Level Examination Program dfgdfgdfg

In your journey to get CLEP Natural Science certified it is important for you to have all information related to your exam. So we have pulled together a list of additional blogs that may be of interest to you because that are all related to the College Level Examination Program.