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Evolution

TermDefinition
adaptation A characteristic that improves an organism's ability to survive & reproduce in an environment.
evolution The process in which inherited characteristics within a population change over generations such that new species sometimes arise.
fossil record A historical sequence of life indicated by fossils found in layers of the earth.
fossil A preserved remnant or impression of an organism that lived in the past most commonly found in sedimentary rock.
natural selection Process where individuals that are better adapted to their environment survive & reproduce more successfully than less well adapted individuals; a theory that explains mechanisms of evolution.
speciation Formation of new species as a result of evolution.
relative dating Any method of determining whether an event or object is older or younger than other events or objects; often uses rock layer placement for determination.
absolute dating Any method of measuring the age of an event or object in years.
mutations A change in the nucleotide sequence of DNA; can be good, bad or neutral.
variations Every individual has its own combination of inherited traits.
Charles Darwin Naturalist who first identified evolution as the driving force of change in organisms in the 1850's.
selective breeding Human practice of breeding animals with desired traits.
camouflage A structural adaptation that enables an organism to blend in with its environment.
extinction Describes a species that no longer has any known living individuals.
Species A group of similar organisms that can breed and produce fertile offspring.
vestigial structures remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
Trait specific characteristic of an individual
Created by: MrsGoodwinSLP
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