Natural Selection and Evolution

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What is natural selection?

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Natural selection is the process by which organisms that are better adapted to their environment tend to survive and produce more offspring.

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What is the significance of common ancestry in evolution?

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Common ancestry refers to the idea that different species share a common ancestor, which can be observed through similarities in DNA, embryonic development, and physical traits.

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What is variation in the context of evolution?

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Variation refers to the differences in traits among individuals of the same species, which can lead to differences in survival and reproduction.

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What role does embryology play in understanding evolution?

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Embryology studies the development of embryos, revealing similarities among different species that suggest a common ancestry.

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What is the selection force in natural selection?

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A selection force is an environmental factor that affects an organism's ability to survive and reproduce, such as food availability or predation.

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How do mutations contribute to evolution?

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Mutations are changes in DNA that can create new traits; if beneficial, these traits may be passed on to future generations.

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What is adaptation?

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Adaptation is a trait that enhances an organism's ability to survive and reproduce in its environment.

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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.

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What is the fossil record?

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The fossil record is the collection of all known fossils, providing evidence of past life and evolutionary changes over time.

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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 loss of habitat.