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  1. Taxonomy | Definition, Examples, Levels, & Classification | Britannica

    Oct 23, 2025 · taxonomy, in a broad sense the science of classification, but more strictly the classification of living and extinct organisms—i.e., biological classification. The term is derived …

  2. Taxonomy - Classification, Organisms, Groups | Britannica

    Oct 23, 2025 · Recent advances in biochemical and electron microscopic techniques, as well as in testing that investigates the genetic relatedness among species, have redefined previously …

  3. biological classification - Students | Britannica Kids | Homework Help

    In biology, classification is the process of arranging organisms, both living and extinct, into groups based on similar characteristics. The science of naming and classifying organisms is called …

  4. Taxonomy - Classification, Naming, Organizing | Britannica

    Oct 23, 2025 · Recent advances in biochemical and electron microscopic techniques, as well as in testing that investigates the genetic relatedness among species, have redefined previously …

  5. Taxonomy - Classification, Naming, Organizing | Britannica

    Oct 23, 2025 · Classification is used in biology for two totally different purposes, often in combination, namely, identifying and making natural groups. The specimen or a group of …

  6. Taxonomy - Ranks, Species, Classification | Britannica

    Oct 23, 2025 · Taxonomy - Ranks, Species, Classification: The goal of classifying is to place an organism into an already existing group or to create a new group for it, based on its …

  7. Classification | biology | Britannica

    Oct 24, 2025 · Classification, in biology, the establishment of a hierarchical system of categories on the basis of presumed natural relationships among organisms. The science of biological …

  8. Phylogeny - Taxonomy, Classification, Systematics | Britannica

    Taxonomy, the science of classifying organisms, is based on phylogeny. Early taxonomic systems had no theoretical basis; organisms were grouped according to apparent similarity.

  9. biological classification - Kids | Britannica Kids | Homework Help

    Biological classification is a system used by scientists to describe organisms, or living things. It is also known as scientific classification or taxonomy. To classify…

  10. Bacteria | Cell, Evolution, & Classification | Britannica

    Nov 7, 2025 · In the late 1970s American microbiologist Carl Woese pioneered a major change in classification by placing all organisms into three domains—Eukarya, Bacteria (originally called …