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| a group of similar species |
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| the science of naming and grouping organisms |
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| groups of organisms in systematics |
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| third smallest rank group of similar genus |
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| the largest and most inclusive of Linnaeus's taxonomic categories |
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| the study of evolutionary relationships among organisms |
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| evolutionary branch of a cladogram that includes a single ancestor and all of its descendants |
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| group that consists of single ancestral species and all of its descendants and excludes any organisms that are not descended from that common ancestor |
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| diagram depicting patterns of shared characteristics among species |
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| a trait that arose in the most recent common ancestor of a particular lineage and was passed along to its descendants |
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| a larger, more inclusive category than a kingdom |
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| domain of unicellular, prokaryotes that have cell walls containing peptidoglycan; corresponds to the kingdom eubacteria |
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| domain consisting of unicellular, prokaryotes that have cell walls that do not contain peptidoglycan; corresponds to the kingdom Archaebacteria |
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| domain consisting of all organisms that have a nucleus; includes protists, plants, fungi, and animals |
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| the group that includes a common ancestor but excludes one or more groups of descendants |
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