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Taxon

Biology TATA boxTaxonomic hierarchy

Taxonomy is the practice and science of classification. The word comes from the Greek Ï"άξις, taxis, 'order' + νόμος, nomos, 'law' or 'science'.

 


Taxonomy: Classifying Life
At least 1.7 million species of living organisms have been discovered, and the list grows longer every year (especially of insects in the tropical rain forest). How are they to be classified?

taxonomy
scientific classification of an organism as a whole
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

taxonomic group
(Science: zoology) A taxon with all its subordinate taxa and their individuals, for example the taxonomic group insecta consists of all insects and their taxa.

Such taxonomies as those analyzed by Durkheim and Lvi-Strauss are sometimes called folk taxonomies to distinguish them from scientific taxonomies that claim to be disembedded from social relations and thus objective and universal.

TAXONOMY
The taxonometric way of classifying organisms is based on similarities between different organisms. A biologist named Carolus Linnaeus started this naming system. He also chose to use Latin words.

taxon -- n. Any named group of organisms, not necessarily a clade; a taxon may be designated by a Latin name or by a letter, number, or any other symbol; taxa- pl.
taxonomy -- The science of naming and classifying organisms.

taxon pl. taxa
[Gk. taxis, arrange, put in order]
The named taxonomic unit at any given level.
taxonomy ...

Taxonomy
The classification of organisms.
Telomere
The terminal part of a linear chromosome. Replication of the ends of linear DNA molecules requires specialized enzymes or structures.

taxon Term applied group of organisms comprising a given taxonomic category ...

Taxonomy
NCBI Taxonomy: Search and browse NCBI's database of organisms.
Genetics/Molecular Biology ...

Taxonomy: The theory and practice of describing, naming and classifying plants and animals. See also systematics.

Taxonomy, the practice of classifying biodiversity, has a venerable history.

Taxonomy is that branch of biology dealing with the identification and naming of organisms. The ancient Greek philosopher Aristotle apparently began the discussion on taxonomy.

Taxonomic distribution
of GSDB base pairs
(10k JPG)
The National Center for Genome Resources (NCGR) is a not-for-profit organization created to design, develop, support, ...

Taxon
General term for a taxonomic group, i.e. species, genus, family.

taxonomy The description of species and the classification of organisms into groups that reflect evolutionary relationships. See phylogenetic systematics, evolutionary systematics, and numerical taxonomy. Also systematics.

Taxonomists can use this technique to explore evolutionary relationships. Individuals of the same species, while not identical, will be more similar than individuals of different species.

Meanwhile, taxonomy and classification became a focus in the study of natural history.

order - taxonomic subdivision that contains groups of related families or superfamilies; usually ending in -ptera in insects (Bio Control Glossary)
ontogeny - the developmental history of an individual (compare to phylogeny) ...

ITIS Integrated Taxonomic Information System
ITU International Telecommunications Union
IUCN International Union for the Conservation of Nature ...

Classify To place a taxon in a classification system.
Cotypes A term no longer recognized in the International Code of Zoological Nomenclature; synonymous with syntypes.
Emendation An intentional change to a previously proposed name, e.g.

Taxonomic terminology
Clade: in cladistics, a group with a common set of shared derived characteristics persumed inherited from a common ancestor Cladistics: a methodology for reconstructing evolutionary relationships of taxa, ...

A more considered definition is Levinton's: "I define the process of macroevolution to be "the sum of those processes that explain the character-state transitions that diagnose evolutionary differences of major taxonomic rank" (Levinton 2001:2).

Evolutionary biology is an inclusive field because it includes scientists from many traditional taxonomically-oriented disciplines.

Variety: Subdivision of a species for taxonomic classification. Used interchangeably with the term cultivar to denote a group of individuals that is distinct genetically from other groups of individuals in the species.

Chromista: A major taxon in the Kingdom Protoctista (also called Heterokonta). They are mostly photosynthetic algae but distinct from the rest of the algae.

Taxonomy
Biomes
Biomes are the world's major habitats. These habitats are identified by the vegetation and animals that populate them. The following resources provide information on the land and aquatic biomes of the world.

Guild. A group of species, possibly unrelated taxonomically, that exploit overlapping resources
Gyre. Major cyclonic surface current systems in the oceans
Halocline. Depth zone within which salinity changes maximally ...

Scientists who classify living things are called taxonomists. It is their job to look at every kind of living thing, and determine how they are similar and how they are different to other living things.

Evolutionary change producing a single lineage in which one taxon replaces another without branching.
Related Terms:
Evolution ...

Taxonomy is based on phylogenetic relationships. Each organism has a two-part name, genus and species: Homo sapiens. (Members of different species, in general, cannot interbreed.)
The Five (or Six) Kingdom System ...

the term applied to several groups of superficially similar hoofed animals which are not necessarily closely related taxonomically, e.g. cows, deer, tapir, pigs, sheep.

Karl von Linné person who lived from 1707 to 1778 and developed the concepts of scientific names and the taxonomic heirarchy
Lipid a group of hydrophobic molecules such as fats‚ oils‚ and waxes
(lipo = fat) ...

See also: Organ, Species, Class, Plant, Evolution