Natural Selection

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What are homologous structures?

Back

Body parts of organisms that are the same in structure and position but different in function.

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NGSS.MS-LS4-2

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What is artificial selection?

Back

When humans decide which traits of an organism are the most desirable and only allow those organisms with the specific, desired traits to breed.

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What are analogous structures?

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Body parts that function like each other, but are different in structure.

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Who developed the theory of evolution?

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Charles Darwin.

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What is biological evolution?

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The change over time in populations of related species.

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

NGSS.MS-LS4-4

Front

What is the significance of variation in a population?

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Variation provides the raw material for natural selection to act upon.

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NGSS.MS-LS4-4

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What is adaptation?

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A trait that helps an organism survive and reproduce in its environment.

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NGSS.MS-LS4-4

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What is the role of competition in natural selection?

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Competition for resources leads to survival of the fittest, where only the best adapted individuals survive.

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NGSS.HS-LS4-2

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What is a vestigial structure?

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A body part that has lost its original function through evolution.

Tags

NGSS.MS-LS4-2

Front

What is the difference between natural selection and artificial selection?

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Natural selection occurs without human intervention, while artificial selection is controlled by humans.