Evolution

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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. An example is the pelvic bone in whales.

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What is natural selection?

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Natural selection is the process where organisms with traits better suited to their environment are more likely to survive and reproduce.

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What is a fossil?

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A fossil is a remnant or trace of an organism from the past, often preserved in rock.

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What are analogous structures?

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Analogous structures are body parts in different species that have similar functions but evolved independently, such as bird wings and butterfly wings.

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What are homologous structures?

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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 adaptation?

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Adaptation is a trait that helps an organism survive and reproduce in its environment.

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What is the significance of genetic variation in evolution?

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Genetic variation is crucial for evolution as it provides the raw material for natural selection to act upon.

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What is the role of mutations in evolution?

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Mutations are changes in DNA that can create new traits, contributing to genetic diversity and evolution.

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What is extinction?

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Extinction is the end of an organism or a group of organisms, often due to environmental changes or competition.

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What is the difference between artificial selection and natural selection?

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Artificial selection is the process by which humans breed organisms for desired traits, while natural selection occurs without human intervention.