Evolution
Evolution is the change of characteristics in an organism through time. The theory of evolution was Darwin's idea of change through natural selection. Natural selection is the environment allowing certain mutations to become more dominant and killing off disadvantageous traits. The four main concepts of natural selection are variation, competition, survival, and reproduction of organisms that survived passing on traits. The reason for species evolution is to fit an environment better for survival, due to mutation and variations. Species evolve because of natural or artificial selection. Artificial selection is the selective breeding of organisms (by humans) for specific desirable characteristics.The environment has an impact on evolution because it determines what traits are going to be beneficial and positive for survival of an organism. This allows a species to be better suited for its environment making it easier to survive. Related species that have the same traits all have a common ancestor. New species can be developed through a mutation or adaption. Adaptions are advantageous mutations that increase the likelihood of survival. Mutations are a copying error in DNA. Evidence of evolution are festival organs, DNA, homologous bone structure, and fossils. The factors that force evolution are potential for species to increase in number, genetic diversity from mutation, competition for limited resources, survival and reproduction of individuals with favorable traits.