Apopulation that is becoming less diverse because of its individuals tending to be larger is most likely experiencing .

Such a population is experiencing DIRECTIONAL SELECTION.

There are three types of natural selection, these are: disruptive, stabilizing and directional selection.

A directional selection refers to the type of selection, in which an extreme phenotype is favored over other phenotype; this makes the alleles frequency to move over a period of time towards the direction of that phenotype. Phenotype refers to the observable characteristics, which an organism exhibits.

A population that is becoming less diverse because of its individuals tending to be larger is most likely experiencing directional selection.

Further Explanation:

Natural selection is adaptive changes that favor the survival and reproduction of only those populations that are well adapted to that environment.Natural selection favors organisms that can adapt to a particular environment. The adaptation need not be necessarily visible through physical appearance as it can be related to the metabolism or anatomy of the individual.  

The disruptive, directional, and stabilizing selections are the three types of natural selection. The directional selection favors the extremes and thus, due to the elimination of intermediate phenotypes, both the variation and average phenotype change.A particular train or extreme phenotype is favored in one direction due to the natural selection. In this selection, there is no relationship between the fitness and the frequency. The differences between the different color types are not affected by the frequency.

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Answer Details:

Grade: High School

Subjects: Biology

Chapter: Evolution

Keywords:

Natural selection, extreme, color, stabilizing selection, visible, phenotype, environment, reproduction, directional, extreme.

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