Evidence of Evolution Practice

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Vestigial Structures

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Structures or organs that seem to serve no purpose but resemble functional structures in other organisms.

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Darwin's Theory of Natural Selection

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The idea that organisms best suited for their environment survive and pass on beneficial traits to their offspring.

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Law of Superposition

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A principle that helps determine the relative age of rock layers, stating that in undisturbed layers, the oldest rocks are at the bottom.

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Biogeography

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The study of where organisms live and how they got there.

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Relative Age of Rock Layers

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Determined by the Law of Superposition, which states that older layers are found beneath younger layers.

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Homologous Structures

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Anatomical features in different species that share a common ancestry, even if they have different functions.

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Fossil Record

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The history of life as documented by fossils, providing evidence for evolution.

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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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Ancestral Traits

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Characteristics inherited from a common ancestor.

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Adaptive Radiation

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The process by which organisms diversify rapidly into a variety of forms to adapt to different environments.