Disruptive Selection

What type of selection can result in the formation of new species?

• Disruptive

• Directional

• Stabilizing

• Artificial

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Use the diagram and description below to predict the type of selection that is occurring for tail length. (a)  

• Disruptive

• Directional

• Stabilizing

• Artificial

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_{What type of selection?}

• Directional 

• Stabilizing

• Disruptive

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If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection

• Disruptive selection 

• Stabilizing selection

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Occurs when environmental conditions fluctuate between two opposite extreme values.

• Artificial selection

• Distruptive selection

• Directional selection

• Stabilizing selection

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Which type of natural selection can lead to the formation of two distinct phenotypes within a population?

• Directional selection

• Disruptive selection

• Stabilizing selection

• Artificial selection

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In a population of butterflies, some individuals have very light wings and others have very dark wings, while those with medium-colored wings are less common. What type of selection is this an example of?

• Directional selection

• Disruptive selection

• Stabilizing selection

• Artificial selection

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NGSS.HS-LS4-4

What is the primary effect of disruptive selection on a population's genetic variance?

• It decreases genetic variance

• It increases genetic variance

• It has no effect on genetic variance

• It eliminates genetic variance

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Which of the following scenarios best illustrates disruptive selection?

• A population of birds where only the largest individuals survive

• A population of fish where both the smallest and largest individuals have higher survival rates than medium-sized individuals

• A population of plants where only the tallest individuals reproduce

• A population of insects where only the fastest individuals survive

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How does disruptive selection differ from stabilizing selection?

• Disruptive selection favors average phenotypes, while stabilizing selection favors extreme phenotypes

• Disruptive selection favors extreme phenotypes, while stabilizing selection favors average phenotypes

• Both favor average phenotypes

• Both favor extreme phenotypes

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