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a trace of ancient organism tht has been preserved in rock or other substance


an organism whose cells lack a nucleus and some other structures


the dense area in a eukaryotic cell that contains...


an organism whose cells contain a nucleuiq


the process of grouping things based on their similarites


the scientifc study of how living things are classified

binomial nomenclature

the system for naming organisms in which each organism is given a unique two-part scientific name indicating its genus and its specie


a classification grouping that consists of a number ofsimilar closely related species


the process by which species gradually change over time


a living thing


the basic unit of structure and function in an organism


the maintence of stable conditions


an organism that makes its own food

controlled experiment

an experiment in which all factors are identical except one

spontaneous generation

the mistaken idea that living things arise from nonliving sources


an action or change in behavior that occurs as a result


consisting of many cells

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