Variations - Traits an organism developes, Speciation - Development of a new species, Population - All members of the same species in an area, Migration - Movement of species in and out of a population, Naturalist - A person who studies nature by observing plants and animals, Fossils - Remains of living things from long ago., Gene Pool - All the genes in a population, Mutation - A change in the structure of gene or chromosome, Natural Selection - Process where well adapted organisms survive to reproduce,

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