Evolution and Classification

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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 evidence supports the theory of evolution?

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Similarities in DNA, fossil records, and anatomical structures among different species support the theory of evolution.

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What are homologous structures?

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Homologous structures are body parts in different species that have similar structures but may serve different functions, indicating a common ancestor.

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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 the difference between autotrophs and heterotrophs?

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Autotrophs produce their own food (e.g., plants), while heterotrophs consume other organisms for energy (e.g., animals).

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What is a dichotomous key?

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A dichotomous key is a tool that allows the identification of organisms based on a series of choices that lead the user to the correct name.

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What is the significance of fossil records in evolution?

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Fossil records provide evidence of past life forms and show how species have changed over time.

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What is the role of the environment in evolution?

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The environment influences which traits are favorable for survival, thus affecting the process of natural selection.

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What is speciation?

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Speciation is the process by which new species arise from existing species due to evolutionary changes.