Understanding Evolution for Grade 10

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Evolution

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Change in heritable traits over generations

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Natural Selection

Back

Process where organisms better adapted to environment tend to survive

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Charles Darwin

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Proposed the theory of natural selection

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Genetic Variation

Back

Differences in DNA among individuals

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Mutation

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Random change in DNA sequence

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Fossil Record

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Historical remnants of organisms showing evolutionary changes

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Speciation

Back

Formation of new and distinct species

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Homologous Structures

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Similar structures in different species due to common ancestry

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Adaptive Radiation

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Rapid evolution of diversely adapted species from a common ancestor

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Survival of the Fittest

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Concept where only the organisms best suited to their environment survive