Evidence for Evolution

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What is evidence for evolution?

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Evidence for evolution includes fossil records, DNA similarities, and anatomical structures that show how species have changed over time.

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What is a vestigial structure?

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A vestigial structure is a body part that has lost its original function through evolution, such as the tiny leg bones in snakes.

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What can fossils tell us about evolution?

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Fossils provide a record of past life forms and show how species have changed over time, helping to establish evolutionary relationships.

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What does it mean if two species share DNA sequences?

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If two species share DNA sequences, it suggests they have a common ancestor and may have evolved from that ancestor.

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How do scientists determine the age of fossils?

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Scientists determine the age of fossils using methods like radiometric dating and studying the layers of sedimentary rock.

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What is the significance of similar DNA in different species?

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Similar DNA in different species indicates that they may have evolved from a common ancestor, supporting the theory of evolution.

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What is natural selection?

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Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

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What is a common ancestor?

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A common ancestor is a species from which two or more different species have evolved.

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What role do mutations play in evolution?

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Mutations introduce genetic variation, which can lead to new traits that may be beneficial for survival and reproduction.

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What is the fossil record?

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The fossil record is the collection of all known fossils and their placement in the geological time scale, providing evidence of evolution.