Evidence for Evolution

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What is evolution?

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Evolution is the process through which species change over time through variations and natural selection.

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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 is homologous structure?

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Homologous structures are body parts in different species that share a common ancestry, even if they have different functions.

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What is analogous structure?

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Analogous structures are body parts in different species that have similar functions but do not share a common ancestry.

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What is fossil evidence?

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Fossil evidence refers to the remains or traces of organisms from the past, which provide insights into the history of life and evolution.

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What is genetic evidence for evolution?

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Genetic evidence for evolution includes similarities in DNA sequences among different species, indicating a common ancestry.

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What is the significance of rock layers in studying evolution?

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Rock layers, or strata, help scientists determine the relative ages of fossils, showing how species have changed over time.

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What does it mean if two species have homologous genes?

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If two species have homologous genes, it means they share a common ancestor and have inherited similar genetic sequences.

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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 the role of mutations in evolution?

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Mutations are changes in DNA that can lead to new traits, providing raw material for natural selection to act upon.