Principals of evolution: Different theories

  • Creationism

    Creationism
    Is the religious believe that the universe and it various forms of life were created by God out of nothing. it was theorized by William Whiston in 1696
  • Catastrophism

    Catastrophism
    is the theory that the Earth has largely been shaped by sudden, short-lived, violent events, probably world wide in scope is associated with the great French naturalist Baron Georges Cuvier (1769-1832)
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    Transformism

    the doctrine of gradual transformation of one species into another by descent with modification through many generations. such transformation itself. any doctrine or instance of evolution.It was theorized in 19th century
  • Lamarckism

    Lamarckism
    hypothesis that an organism can pass on characteristics that it has acquired through use or disuse during its lifetime to its offspring.It is also known as the inheritance of acquired characteristics or soft inheritance. It is inaccurate named after the French biologist Jean-Baptiste Lamarck, who incorporated the action of soft inheritance into his evolutionary theories as a supplement to his concept of orthogenesis, a drive towards complexity.
  • Uniformitarianism

     Uniformitarianism
    is a theory based on the work of James Hutton, later in 1832 coined by William Whewell proposed the theory to contrast catastrophism, and made popular by Charles Lyell in the 19th century. This theory states that the forces and processes observable at earth’s surface are the same that have shaped earth’s landscape throughout natural history. Is the counterpart of catastrophism.
  • Evolution by natural selection

    Evolution by natural selection
    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".
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    The Modern Synthetic theory of Evolution

    explains the evolution of life in terms of genetic changes occurring in the population that leads to the formation of new species. Synthetic theory of Evolution was introduced to us by few legendary evolutionary biologists naming T. Dobzhansky, J.B.S. Haldane, R.A. Fisher, Sewall Wright, G.L. Stebbins, Ernst Mayr in the years 1930 and 1940.