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Domain

Divides cellular life forms into three groups: prokarya, archea, and eukarya.

Human = Eukarya

Halobacterium = Archaea

Salmonella = Bacteria

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Kingdom

The six kingdoms are Animalia, Plantae, fungi, Protista, Bacteria, Archaea.

Humans are animals.

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Phylum

Grouping organisms based on general body plan and developmental/internal organization.

Humans are in the phylum Chordata.

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Class

Humans are in the class mammalia.

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Order

Humans are primates.

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Family

Characteristic Endings

zoological (-idae)

botanical (-aceae)

Humans are in the family hominidae.

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Genus (Genera)

Humans are in the genus homo.

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Species

A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring.

Genus, Specific Epithet

Humans are in the species homo sapiens.

Sub-Species

Organisms that belong to different subspecies of the same species are capable of interbreeding and producing fertile offspring, but they usually do not interbreed in nature due to geographic isolation or other factors. Characteristics attributed to subspecies generally have evolved as a result of geographical distribution or isolation.

Humans are in the sub-species homo sapiens sapiens.