Evolution

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What is natural selection?

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Natural selection is the process in which helpful traits become more common in a population over time, leading to evolutionary changes.

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What are homologous structures?

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Homologous structures are anatomical features in different species that share a common ancestry but may serve different functions.

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What is an example of natural selection?

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The long and sharp beak of a woodpecker is an example of natural selection, as it helps the bird access food.

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What are vestigial structures?

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Vestigial structures are remnants of organs or structures that had a function in an early ancestor but are no longer useful in the current organism.

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What is adaptive radiation?

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Adaptive radiation is the process by which organisms diversify rapidly into a wide variety of forms to adapt to different environments.

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What is gene flow?

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Gene flow is the transfer of genetic material between populations, which can lead to changes in allele frequencies.

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What is a fossil?

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A fossil is the preserved remains or traces of ancient organisms, providing evidence of past life and evolution.

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What is the significance of fossil layers?

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Fossil layers in sedimentary rock can indicate the relative ages of fossils, with deeper layers typically being older.

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What is selective breeding?

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Selective breeding is the process by which humans breed plants and animals for specific traits.

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What is a trait?

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A trait is a characteristic or feature of an organism, which can be influenced by genetics and the environment.