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Theory of evolution

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A scientific theory that explains how species evolve over time through natural selection and genetic variation.

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Species

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A group of organisms that can interbreed and produce fertile offspring.

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Extinct

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A term used to describe a species that no longer exists.

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Fossils

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Preserved remains or traces of ancient organisms that provide evidence of past life on Earth.

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Radiometric dating

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A method used to determine the age of rocks and fossils based on the decay rate of radioactive isotopes.

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Homologous structures

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Body parts that are similar in structure in different species due to shared ancestry.

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Common Ancestor

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An ancestral species from which multiple species have evolved.

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Phylogenic tree

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A diagram that represents evolutionary relationships among organisms.

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Competition

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The struggle between organisms for the same resources within an environment.

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Hereditary

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The passing of traits from parents to offspring through genes.