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…showed last 75 words of 514 total…the species whose most fit. The Theory of Evolution and Natural selection are key components of a greater whole. The Genes produce traits which if beneficial, aid in the survival of the species. This includes competition for living space and food resources, as well as mates. Natural selection gives many species the ability to survive in changing environments. Last these processes lead to the adoption of features which allow for the continuation of a species.