Evolution, Process by which organisms change over time, Geographic Isolation, Geographic barrier separates two populations, Fossils, Remains of organisms from long ago., Naturalist, A person who studies nature by observing plants and animals, Population, A species living in one area, Gene pool, Collection for all the genes and traits in a population, Speciation, When two new species are created from one species, Variations, The differences among organisms, Mutation, A change in the structure of a gene or chromosome, Migration, Movement of a species out of a population, Natural Selection, A process where organisms with certain traits have a better chance to survive and reproduce.

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