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14 Cards in this Set
- Front
- Back
taxonomy |
the field in biology that deals with classifying organisms |
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domain |
the largest group in the classification system ex: eukarya |
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kingdom |
the next level down from domain ex: archaebacteria |
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prokaryote |
single-called organism which lacks a nucleus and organelles ex: e. coli |
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eukaryote |
organism whose cells contain a nucleus and other membrane-bound organelles ex: skin cell |
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binomial nomenclature |
classification system which gives each kind of organism a unique two-part scientific name |
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genus |
the level just below 'family', members of a genus are very closely related; genus is the first part of an organism's scientific name ex: Homo in Homo habilis |
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chordate |
animal having a dorsal tubular nerve cord, a notochord, pharyngeal pouches, and a postanal tail at some point in its development ex: whale |
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phylogenic tree |
diagram whose branches show the evolutionary links among different groups of organisms |
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phylogeny |
the evolutionary history of a group of organisms |
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cladogram |
branching diagram representing the proposed phylogeny of a species or group |
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dichotomous key |
method for determining classification by posing a series of two-part questions based on traits of an organism |
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invertebrate |
animal without a backbone, about 95-99% of animal species ex: worm |
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hierarchically |
a system of organization in which people or groups are ranked one above or below the other to show relatedness between or among living things |