Variation - individuals of a population differ genetically from each other. , Fossils - hardened remains of ancient organisms, Evolution - process of change over time, occurs in populations NOT INDIVIDUALS, Charles Darwin - one aauthor of the book, “On the Origin of Species: By Means of Natural Selection”, Natural Selection - process in which organisms with the most adaptive heritable traits will survive, reproduce, and pass on those traits, Overproduction - organisms produce more offspring than are likely to survive. , Homologous Structures - similar structure, different function, shared common ancestor, Analogous Structure - different structure, similar function, different evolutionary ancestors, Vestigial Structure - structures that no longer serve a purpose (Example: Whale hips), Artificial Selection - humans selectively breed organisms to produce offspring with desirable traits, Adaptations - heritable characteristics which increase an organism's chances of survival, Mutations - changes in DNA or RNA sequence, Speciation - evolution of a new species from an existing species,

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