Types of Natural Selection

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What is Stabilizing Selection?

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A type of natural selection that favors average individuals in a population, reducing variation and maintaining the status quo.

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What is Disruptive Selection?

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A type of natural selection that favors extreme traits over average traits, leading to two or more contrasting phenotypes in a population.

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What is Directional Selection?

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A type of natural selection that favors one extreme phenotype over others, causing a shift in the population's traits.

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Define Adaptation in the context of natural selection.

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Characteristics that enhance an organism's ability to survive and reproduce in its environment.

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What does 'survival of the fittest' mean in natural selection?

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It refers to the idea that individuals best adapted to their environment are more likely to survive and reproduce.

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What is the role of variation in natural selection?

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Variation provides the raw material for natural selection, allowing some individuals to be better suited to their environment.

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What is the difference between natural selection and artificial selection?

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Natural selection occurs through environmental pressures, while artificial selection is driven by human choices.

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What is an example of Stabilizing Selection?

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Robins laying four eggs; too many or too few eggs can lead to malnourished or non-viable chicks.

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What is an example of Disruptive Selection?

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A population of birds with either very small or very large beaks, but few with average-sized beaks.

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What is an example of Directional Selection?

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The increase in size of a population of animals due to a change in environmental conditions favoring larger individuals.