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When selection acts to eliminate both ex...

When selection acts to eliminate both extremes from an array of phenotypes, the frequency of intermediate type, which is already present in more, gets increased. This type of selection is called

A

Disruptive selection

B

Directional selection

C

Stabilising selection

D

Non-directional selection

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To solve the question regarding the type of selection that eliminates both extremes from an array of phenotypes while increasing the frequency of the intermediate type, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Question**: The question describes a scenario where selection acts to eliminate both extremes of phenotypes, leading to an increase in the frequency of the intermediate phenotype. 2. **Identify the Types of Selection**: We have four options to consider: - Disruptive Selection - Directional Selection - Stabilizing Selection - Non-Directional Selection 3. **Analyze Each Type of Selection**: - **Disruptive Selection**: This type favors both extremes of a phenotype over the intermediate phenotype. Therefore, it does not fit the scenario described in the question. - **Directional Selection**: This type favors one extreme phenotype over the others, causing a shift in the population towards that extreme. This also does not match the scenario. - **Stabilizing Selection**: This type favors the intermediate phenotype and selects against both extremes. In this case, the frequency of the intermediate phenotype increases as the extremes are eliminated. This aligns perfectly with the scenario presented in the question. - **Non-Directional Selection**: This term is not commonly used in the context of natural selection and does not apply to the scenario described. 4. **Conclusion**: Based on the analysis, the type of selection that eliminates both extremes while increasing the frequency of the intermediate phenotype is **Stabilizing Selection**. ### Final Answer: The correct answer is **Stabilizing Selection**.
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