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CSChapter 17

Biology 2 Chapter 17

TermDefinition
classification is the grouping of objects or organisms based on a set of criteria
taxonomy is a discipline of biology primarily concerned with identifying, naming, and classifying species based on natural relationships
binomial nomenclature gives each species a scientific name that has two parts
taxon a named group of organisms
genus a group of species that are closely related and share a common ancestor
family is the next higher taxon, consisting of similar , related genera
order contains related families
class contains related orders
phylum contains related classes
division the classification of bacteria and plants
kingdom the taxon composed of related phyla or divisions
domain is the broadest of all the taxa and contains one or more kingdoms
phylogeny is the evolutionary history of a species
character inherited fetures that vary among species
molecular clock is a model that is used to compare DNA sequences from two different species to estimate how long the species have been evolving since they diverged from a common ancestor.
cladistics is a method that classifies organisms according to the order that they diverged from a common ancestor.
cladogram is a branching diagram that represents the proposed phylogeny or evolutionary history of a species or group.
archaea the species classified in Domain Archaea
protist are eukaryotic organisms that can be unicellular, colonial, or multicellular.
fungus is a unicellular or multicellular eukaryote that absorbs nutrients from organic materials in its environment
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