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  2. Bacterial taxonomy - Wikipedia

    en.wikipedia.org/wiki/Bacterial_taxonomy

    Presently, scientists classify all life into just three domains, Eukaryotes, Bacteria and Archaea. [2] Bacterial taxonomy is the classification of strains within the domain Bacteria into hierarchies of similarity. This classification is similar to that of plants, mammals, and other taxonomies. However, biologists specializing in different areas ...

  3. Three-domain system - Wikipedia

    en.wikipedia.org/wiki/Three-domain_system

    The three-domain system adds a level of classification (the domains) "above" the kingdoms present in the previously used five- or six-kingdom systems.This classification system recognizes the fundamental divide between the two prokaryotic groups, insofar as Archaea appear to be more closely related to eukaryotes than they are to other prokaryotes – bacteria-like organisms with no cell nucleus.

  4. Domain (biology) - Wikipedia

    en.wikipedia.org/wiki/Domain_(biology)

    A speculatively rooted tree for RNA genes, showing major branches Bacteria, Archaea, and Eukaryota The three-domain tree and the eocyte hypothesis (two-domain tree), 2008. [7] Phylogenetic tree showing the relationship between the eukaryotes and other forms of life, 2006. [8] Eukaryotes are colored red, archaea green, and bacteria blue.

  5. List of bacterial orders - Wikipedia

    en.wikipedia.org/wiki/List_of_bacterial_orders

    This article lists the orders of the Bacteria.The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [1] and National Center for Biotechnology Information (NCBI) [2] and the phylogeny is based on 16S rRNA-based LTP release 132 by The All-Species Living Tree Project.

  6. Taxonomic rank - Wikipedia

    en.wikipedia.org/wiki/Taxonomic_rank

    There are seven main taxonomic ranks: kingdom, phylum or division, class, order, family, genus, and species. In addition, domain (proposed by Carl Woese) is now widely used as a fundamental rank, although it is not mentioned in any of the nomenclature codes, and is a synonym for dominion (Latin: dominium), introduced by Moore in 1974. [12] [13]

  7. Kingdom (biology) - Wikipedia

    en.wikipedia.org/wiki/Kingdom_(biology)

    Combined with the five-kingdom model, this created a six-kingdom model, where the kingdom Monera is replaced by the kingdoms Bacteria and Archaea. [16] This six-kingdom model is commonly used in recent US high school biology textbooks, but has received criticism for compromising the current scientific consensus. [ 13 ]

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  9. Two-domain system - Wikipedia

    en.wikipedia.org/wiki/Two-domain_system

    It consists of all bacteria, which are prokaryotes (lacking nucleus), thus, Domain Bacteria is made up solely of prokaryotic organisms. [62] [63] Some examples are: Cyanobacteria – photosynthesising bacteria related to the plastids of eukaryotes. [64] Spirochaetota – Gram-negative bacteria involved in human diseases like syphilis and lyme ...