A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce - Species, Change over time; the process by which organisms have descended from ancient organisms - Evolution, The preserved remains or traces of an organism that lived in the past - Fossil, An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment - Adaptation, A well-tested explanation for a wide range of observations or experimental results - Scientific Theory, The process by which organisms that are best adapted to their environment are most likely to survive and reproduce - Natural Selection, the struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time - Competition, The process by which two species evolve in response to changes in each other over time - Coevolution, All the fossils that have been discovered and what scientists have learned from them - Fossil record, Structures that are similar in different species and that have been inherited from a common ancestor - Homologous structure, Term used to describe a group of related organisms that has died out has no living members - Extinct,

Evolution

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