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14 Cards in this Set

  • Front
  • Back

taxonomy

the field in biology that deals with classifying organisms

domain

the largest group in the classification system


ex: eukarya

kingdom

the next level down from domain


ex: archaebacteria

prokaryote

single-called organism which lacks a nucleus and organelles


ex: e. coli

eukaryote

organism whose cells contain a nucleus and other membrane-bound organelles


ex: skin cell

binomial nomenclature

classification system which gives each kind of organism a unique two-part scientific name

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

chordate

animal having a dorsal tubular nerve cord, a notochord, pharyngeal pouches, and a postanal tail at some point in its development


ex: whale

phylogenic tree

diagram whose branches show the evolutionary links among different groups of organisms

phylogeny

the evolutionary history of a group of organisms

cladogram

branching diagram representing the proposed phylogeny of a species or group

dichotomous key

method for determining classification by posing a series of two-part questions based on traits of an organism

invertebrate

animal without a backbone, about 95-99% of animal species


ex: worm

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