Natural Selection Curves

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What is Natural Selection?

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Natural Selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is Directional Selection?

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Directional Selection is a type of natural selection that favors one extreme phenotype over the mean or other extreme phenotypes.

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What is Stabilizing Selection?

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Stabilizing Selection is a type of natural selection that favors intermediate variants and acts against extreme phenotypes.

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What is Disruptive Selection?

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Disruptive Selection is a type of natural selection that favors extreme phenotypes over intermediate phenotypes.

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Example of Directional Selection?

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An example of Directional Selection is the increase in size of the beaks of birds during a drought when only large seeds are available.

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Example of Stabilizing Selection?

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An example of Stabilizing Selection is when birds that lay an optimal number of eggs have the highest survival rate of their offspring.

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Example of Disruptive Selection?

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An example of Disruptive Selection is a population of birds where both very small and very large beaks are favored, while medium-sized beaks are not.

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What is the significance of Natural Selection in evolution?

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Natural Selection is a key mechanism of evolution, leading to adaptations that enhance survival and reproduction.

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How does Natural Selection affect genetic variation?

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Natural Selection can reduce genetic variation by favoring certain traits over others, leading to a more homogenous population.

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What role does the environment play in Natural Selection?

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The environment determines which traits are advantageous, influencing the survival and reproduction of organisms.