Evolution and Natural Selection 2025R

Front

What is a vestigial structure?

Back

A vestigial structure is a body part that has lost its original function through evolution. Example: The pelvic bones in snakes.

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What does it mean if two organisms share similar protein sequences?

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It suggests that the two organisms share a common ancestor.

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What are homologous structures?

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Homologous structures are body parts in different species that have a similar origin but may serve different functions. Example: The forelimbs of humans and bats.

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What is Darwin's Theory of Natural Selection?

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Darwin's Theory states that organisms with traits better suited to their environment are more likely to survive and reproduce.

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What is fitness in the context of evolution?

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Fitness refers to an organism's ability to survive and reproduce in its environment.

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What is an analogous structure?

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An analogous structure is a body part that serves a similar function in different species but does not share a common ancestry. Example: Wings of birds and insects.

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What is the significance of mutations in evolution?

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Mutations introduce genetic variation, which can lead to new traits that may be beneficial for survival.

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What is the difference between natural selection and artificial selection?

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Natural selection occurs through environmental pressures, while artificial selection is driven by human choices.

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What is a fossil?

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A fossil is the preserved remains or traces of an organism that lived in the past, providing evidence for evolution.

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What is the concept of adaptation?

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Adaptation is the process by which a species becomes better suited to its environment through evolutionary changes.