Evolution Test Review ACA

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What is directional selection?

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

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What is stabilizing selection?

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A type of natural selection that favors intermediate phenotypes and reduces variation, maintaining the status quo for a particular trait.

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What is disruptive selection?

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A type of natural selection that favors extreme phenotypes at both ends of the spectrum, potentially leading to speciation.

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What is sexual selection?

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A mode of natural selection where individuals with certain inherited characteristics are more likely than others to obtain mates.

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What is artificial selection?

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The intentional breeding of certain traits over others by humans, leading to changes in the traits of domesticated species.

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What is behavioral isolation?

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A reproductive isolation mechanism where different species have different mating behaviors, preventing them from interbreeding.

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What is mechanical isolation?

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A reproductive isolation mechanism where differences in reproductive structures prevent successful mating between species.

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What is temporal isolation?

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A reproductive isolation mechanism where species breed at different times, preventing them from mating.

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What is gametic isolation?

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A reproductive isolation mechanism where sperm and egg from different species are incompatible, preventing fertilization.

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What is the significance of the youngest geological layer?

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The youngest layer represents the most recent deposits and can provide insights into current environmental conditions and species present.