roduction ? Three features of evolution ? Influence Darwin ’ s theory of evolution is also called Darwinism. It is about the idea that all plants and animals develop gradually from simpler to more complicated forms by natural selection, which is the process by which only plants and animals that are naturally suitable for life in their environment will continue to live, while all others will die. Three feathers ? The Premise —— all life is related and has descended from mon ancestor ? Natural selection —— acts to preserve and accumulate minor advantageous ic mutations( 变异) . ? A slow gradual process —— natural selection acts only by taking advantage of slight essive variations; It can never take a great and sudden leap, but must advance by short and sure, though slow steps."
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