Evolution - change in the gene pool over time, Mutations - random changes in the gene pool, Adaptations - characteristic that improves an individual's ability to survive and reproduce in a particular enviroment, Variations - the occurrence of hereditary or nonhereditary differences between different individual of population, Natural selection - the process by which organisms that inherit advantageous traits tend to reproduce more successfully than other organisms do, Overproduction - producing more offspring than the environment can support, Fossils - remains or imprints of once living things, Coevolution - when two species evolve together, each one making changes in response to the other, Geographic speciation - when a species is separated by a landform such as mountains, resulting in 2 new species, Ancestor - an early type of organism from which other organisms have evolved, Acquired trait - a trait that is not passed onto offspring because these traits do not become part of an organism's DNA, Speciation - the formation of a new species, Fitness - an organism's ability to survive and reproduce in a particular environment,

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