Evolution

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What is evolution?

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Change over time in the characteristics of a species.

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What is a fossil?

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The physical remains of a plant or animal preserved in rock or Earth's crust.

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Why do different species have different shaped beaks?

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To be able to eat the food readily available in the environment.

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What does it mean to have a common ancestor?

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It means that different species share a lineage from a species that existed in the past.

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What is natural selection?

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The process by which organisms better adapted to their environment tend to survive and produce more offspring.

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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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What is the significance of homologous structures?

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They indicate a common ancestry among different species.

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What is the role of mutations in evolution?

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Mutations introduce new genetic variations that can lead to evolutionary changes.

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What is speciation?

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The process by which new species arise from existing species.

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What is the difference between artificial selection and natural selection?

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Artificial selection is the intentional breeding for certain traits, while natural selection is the process by which traits become more or less common due to natural pressures.