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  2. 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.

  3. 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.

  4. Horizontal gene transfer in evolution - Wikipedia

    en.wikipedia.org/wiki/Horizontal_gene_transfer...

    The three main early branches of the tree of life have been intensively studied by microbiologists because the first organisms were microorganisms. Microbiologists (led by Carl Woese) have introduced the term domain for the three main branches of this tree, where domain is a phylogenetic term similar in meaning to biological kingdom.

  5. Kingdom (biology) - Wikipedia

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

    Based on RNA studies, Carl Woese thought life could be divided into three large divisions and referred to them as the "three primary kingdom" model or "urkingdom" model. [15] In 1990, the name "domain" was proposed for the highest rank. [5] This term represents a synonym for the category of dominion (lat. dominium), introduced by Moore in 1974 ...

  6. Taxonomy (biology) - Wikipedia

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

    First proposed in 1977, Carl Woese's three-domain system was not generally accepted until later. [69] One main characteristic of the three-domain method is the separation of Archaea and Bacteria , previously grouped into the single kingdom Bacteria (a kingdom also sometimes called Monera ), [ 68 ] with the Eukaryota for all organisms whose ...

  7. Technological pedagogical content knowledge - Wikipedia

    en.wikipedia.org/wiki/Technological_pedagogical...

    Accordingly, the TPACK model consists of three main domains, each containing one subdomain. The purpose of the subdomains is to unpack the broader domain concept by understanding intersections among the three primary knowledge anchors for the overall framework. The main domains are 1. Technological Content Knowledge (TCK); 2.

  8. Bloom's taxonomy - Wikipedia

    en.wikipedia.org/wiki/Bloom's_taxonomy

    The taxonomy divides learning objectives into three broad domains: cognitive (knowledge-based), affective (emotion-based), and psychomotor (action-based), each with a hierarchy of skills and abilities. These domains are used by educators to structure curricula, assessments, and teaching methods to foster different types of learning.

  9. Microbial ecology - Wikipedia

    en.wikipedia.org/wiki/Microbial_ecology

    It concerns the three major domains of life—Eukaryota, Archaea, and Bacteria—as well as viruses. [2] This relationship is often mediated by secondary metabolites produced by microorganisms. These secondary metabolites are known as specialized metabolites and are mostly volatile or non volatile compounds.