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Darwin's Theory of EvolutionDarwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.

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Darwin's Theory of EvolutionDarwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.

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The highest classification into which living organisms are grouped in Linnea taxonomy, ranking above a phylum. One widely accepted system of classification divides life into five kingdom: prokaryotes, protists, fungi, plants, and animals.

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Biology A division of organisms that ranks above a kingdom in systems of classofocation that are based on shared similarities in DNA sequences rather than shared structural similarities. In these systems, there are three domains: the archaea, the bacteria, and the eukaryotes.

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Taxonomic Keyis a device used by biologists for identifying unknown organisms

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Taxonomic Keyis a device used by biologists for identifying unknown organisms

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a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit, ranking below a genus and denoted by a Latin binomial.

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a principal taxonomic category that ranks above species and below family, and is denoted by a capitalized Latin name, e.g. Leo.

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The system of nomenclature in which two terms are used to denote a species of living organism, the first one indicating the genus and the second the specific epithet.

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The branch of science concerned with classification, especially of organisms; systematics.

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The action or process of classifying something. A category into which something is put.