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  1. He saw this natural selection as the mechanism by which advantageous variations were passed on to later generations and less advantageous traits gradually disappeared. He worked on his theory for more than 20 years before publishing it in his famous On the Origin of Species by Means of Natural Selection (1859).

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  3. Jun 4, 2019 · Natural selection is the mechanism that causes evolutionary change, helping organisms adapt to their environment. Charles Darwin and Alfred Wallace published simultaneous papers in the subject in 1858, and Darwin subsequently published many additional works on evolution and natural selection.

    • Bert Markgraf
  4. Pre-Darwinian ideas about evolution. A visit to the Galapagos Islands in 1835 helped Darwin formulate his ideas on natural selection. He found several species of finch adapted to different environmental niches. The finches also differed in beak shape, food source, and how food was captured.

  5. Darwin's theory. 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]

  6. education.nationalgeographic.org › resource › theoryTheory of Evolution - Education

    Oct 19, 2023 · Darwin and a scientific contemporary of his, Alfred Russel Wallace, proposed that evolution occurs because of a phenomenon called natural selection. In the theory of natural selection, organisms produce more offspring than are able to survive in their environment.

  7. Explain how the writings of Charles Lyell and Thomas Malthus helped Darwin develop his theory of evolution by natural selection. Discuss the role artificial selection had on Darwin's theory.

  8. Sep 12, 2024 · Charles Darwin (born February 12, 1809, Shrewsbury, Shropshire, England—died April 19, 1882, Downe, Kent) was an English naturalist whose scientific theory of evolution by natural selection became the foundation of modern evolutionary studies.

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