Theory of "survival of the fittest"

In this way, friendly or beneficial variations of traits argon retained, and harmful or useless ones ar lost from the gene pool (About). Across succeeding generations, several(predicate) species thus undergo adaptations by the gradual accumulation of useful variations of traits which make them better able to survive and successfully produce in their particular environment. In this way, new species evolve through a series of many small and imperceptible steps. Darwin suggested that the behavior of domesticated animals was an artificial means of pickax by which creation determined which animals would breed together so that they could control which favorable traits they wished to engende

Darwin suggested that sexual selection did non always agree with his "survival of the fittest" notion of natural selection (About).

Some species are attracted to their mates by virtue of features which are not at all necessary for survival in a particular environment and confer no heighten survival capacity on their offspring. As an example, he cited the peacock, the antheral of which species has extremely elaborate tail plumage which confers no particular(a) survival advantage in its environment, but serves to attract females of the species by virtue of its colorful display. It does not necessarily attract a mate with survival advantages either.

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