18 terms

Chapter 18 Classification

Miller and Pearson Text
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binomial nomenclature
classification system in which each species is assigned a two-part scientific name
genus
group of closely related species; the first part of the scientific name in binomial nomenclature
systematics
study of the diversity of life and the evolutionary relationships between organisms
taxon
group or level of organization into which organisms are classified
family
in classification, a group of similar genera
order
in classification, a group of closely related families
class
in classification, a group of closely related orders
phylum
in classification, a group of closely related classes
kingdom
largest and most inclusive group in classification
phylogeny
largest and most inclusive group in classification
clade
evolutionary branch of a cladogram that includes a single ancestor and all its descendants
monophyletic group
group that consists of a single ancestral species and all its descendants and excludes any organisms that are not descended from that common ancestor
cladogram
diagram depicting patterns of shared characteristics among species
derived character
trait that appears in recent parts of a lineage, but not in its older members
domain
a larger, more inclusive taxonomic category than a kingdom
Bacteria
domain of unicellular, prokaryotes that have cell walls containing peptidoglycan; corresponds to the kingdom eubacteria
Archaea
domain consisting of unicellular, prokaryotes that have cell walls that do not contain peptidoglycan; corresponds to the kingdom Archeabacteria
Eukarya
domain consisting of unicellular, prokaryotes that have cell walls that do not contain peptidoglycan; corresponds to the kingdom Archeabacteria