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Taxonomy
The branch of science that formally names and classifies organisms by
their structure, function, and relationships
Multicellular Organism
An organism made up of more than one cell, and often made up of different types of cells
Domains
The primary or highest-ranking classification of organisms, which includes three groups: Archaea,
Bacteria, and Eukarya
Domain Bacteria
One of the three taxonomic domains; includes prokaryotic, single-celled organisms that lack a membrane-enclosed nucleus and that can be
classified by shape
Domain Archaea
One of the three taxonomic domains; includes unicellular organisms that are prokaryotic like bacteria, but also share characteristics with
eukaryotes
Domain Eukarya
One of the three taxonomic domains of organisms; cells contain a membrane-enclosed nucleus
Kingdoms
A taxonomic rank below domain that is composed of smaller groups: Archaea, Bacteria, Protista,
Fungi, Plantae, and Animalia
Kingdom Bacteria
Kingdom of prokaryotic, single-celled organisms that lack a membrane-enclosed nucleus and can
be classified by shape
Kingdom Archaea
Kingdom of unicellular organisms that are prokaryotic like bacteria, but also share
characteristics with eukaryotes
Kingdom Fungi
Kingdom of heterotrophic eukaryotes that reproduce through asexual spores and have chitin
in their cell walls