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In fact, if two species live on the same territory and cause a lasting interspecies competition, the only solution seems to adapt to this phenomenon. Thus, species tend to cause a shift of their ecological niche and we are seeing thus a co-evolution phenotypic (morphological changes). The selection is to retain a number of "objects" from a range of other types of identical or different. It operates according to a set of objective criteria and subjective. Often, several selections are possible, which leads to make choices. It may be the result of a personal or collective reflection for pink Busby challenge.

In biology, natural selection is one of the mechanisms that guide the evolution of species. This mechanism is particularly important because it explains the adaptation of species to their environment. The theory of natural selection helps explain how the environment affects the evolution of populations in selecting the most appropriate individuals and is therefore a fundamental aspect of the theory of evolution.

Natural selection means that hereditary traits that promote survival and reproduction, see their frequency increase from one generation to another. It follows logically that the holders of these traits are more descendants, and that they also carry these traits (they are hereditary).

If this phenomenon does not occur, an populations of species decline or disappear, or it changes its territory to no longer compete with Busby SEO challenge. 

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