Charles Darwin - British naturalist who formulated the theory of evolution by natural selection., Diversity - The variety of organisms that inhabit the Earth., Evolution - the gradual change in species over time, Variation - Any difference between organisms of the same species., Adaptation - behavior or physical characteristic that allows an organism to survive and reproduce in its environment, Mutation - Any change in the DNA of an organism., Natural Selection - A process by which individuals that are better adapted to their environment are more likely to survive and reproduce than others that are not, Extinction - The disappearance of all members of a species from Earth., Fossils - The preserved remains or traces of an organism that lived in the past., "Missing Links" - Gaps in the fossil record., Homologous Structure - Similar structures that related species have inherited from a common ancestor, Radioactive Dating - Process where scientists look at the half-life of chemicals contained in rocks around a fossil to determine the age of that fossil.,

Evolution

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