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Archaea

one of the three domains of life, containing single-celled prokaryotes in the kingdom Archaea

Bacteria

one of three domains of life, containing single-celled prokaryotes in the kingdom Bacteria

Binomial Nomehclature

naming system in which each species is given a two-part scientific name (genus and species) using Latin words

Cladistics

method of organizing species by evolutionary relationships in which species are grouped according to the order that they diverged from their ancestral line

Cladogram

diagram that dispays propsed evolutionary relationships among a group of species

Derived Characters

trait that differs in structure of function from that found in the ancestral line for a group of species; used in contributing cladograms

Eukarya

one of the three domains of life, contains all eukaryotes in kingdoms Protista, Plantae, Fungi, and Animals

Genus

first name in binomial nomenclature; the second-most specific taxon in the Linnaean classification system that include one or more physically similar species, which are thought to be closely related

Phylogeny

evolutionary history of a group of related species

Taxon

(plural:taxa) level coithin the Linnaean system of classification (kingdom, phylum, class, order, family, genus, or species) that is organized into a nested hierarchy

Taxonomy

science of classifying and naming organism

Clade

a group of species that shares a common ancestor

Outgroup

a group of species that shares no derived characters with the other groups being studied

Primitive Character

a trait that groups and outgroups share

Nodes

a place where the branch splits

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