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    Natural selection - Wikipedia

    In 1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. He defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved". [17] See more

    Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable See more

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    Heritable variation, differential reproduction
    Natural variation occurs among the individuals of any population of organisms. Some differences may improve an individual's chances of surviving and reproducing such … See more

    Natural selection is seen in action in the development of antibiotic resistance in microorganisms. Since the discovery of penicillin in 1928, antibiotics have been used to fight bacterial … See more

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    Pre-Darwinian theories
    Several philosophers of the classical era, including Empedocles and his intellectual successor, the See more

    The term natural selection is most often defined to operate on heritable traits, because these directly participate in evolution. However, … See more

    Natural selection can act on any heritable phenotypic trait, and selective pressure can be produced by any aspect of the environment, … See more

    A prerequisite for natural selection to result in adaptive evolution, novel traits and speciation is the presence of heritable genetic variation that … See more

     
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