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BMMS Life Sci Chpt 7


species A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce.
fossil The preserved remains or traces of an organism that lived in the past.
adaptation A behavior or physical characteristic that allows an organism to survive or reproduce in its environment.
evolution The gradual change of a species over time.
scientific theory A well tested concept that explains a wide range of observations.
natural selection The process by which individuals that are better adapted to their environment and more likely to survive and reproduce than others of the same species.
variation A difference between individuals of the same species.
comparative anatomy The comparison of the structures of different organisms.
homologous structures Body parts that are structurally similar in related species.
habitat A specific environment that provides the things that an organism needs to live, grow, and reproduce.
extinct The disappearance of all members of a species from Earth.
branching tree diagram A diagram that shows how scientists think different groups of organisms are related.
shared derived characteristics A characteristic, usually a homologous structure, shared by all organisms in a group.
Created by: tsheldon