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a taxonomic category containing orders with common characteristics


the division of organisms into groups, or classes, based on specific characteristics

Dichotomous Key

an aid that is used to identify unknown organisms and that consists of the answers to a series of questions, of which each involves alternate choices


the taxonomic category below the order and above the genus


the level of classification that comes after family and that contains similar species


the highest taxonomic category, which contains a group of similar phyla


the taxonomic category below the class and above the family


the taxonomic group below kingdom and above class


a group of organisms that are closely related and can mate to produce fertile offspring; also the level of classification below genus


the science of describing, naming, and classifying organisms

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