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11 Cards in this Set
- Front
- Back
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remains of organisms preserved in the earth
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Fossil
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organisms made up of a single cell
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Unicellular organism
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organism made up of many cells
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multicellualr organism
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huge numbers of species teh have died or become extinct in a very short time
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mass extinction
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the process through which species change overtime
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evolution
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members of a species that are best suited to their environment that can survive and reproduce at a higher rate that other members of their species
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natural selection
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an inherited trait that gives an ogranism an advantage in its particular environment
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adaption
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the evolution of new species from an existing species
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specialization
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are physical structures that were fully developed and functional in an earlier group of organisms but are reduced and unused in later species
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vestigial organs
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an early form of an organism from which later forms descend
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ancestor
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a segment of DNA that relates to a specific trait or function of an organism
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gene
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