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2. Taxonomic rank - Wikipedia

   en.wikipedia.org/wiki/Taxonomic_rank

   For example, the mammals of Europe, Africa, and upper North America [a] are in class Mammalia, legion Cladotheria, sublegion Zatheria, infralegion Tribosphenida, subclass Theria, clade Eutheria, clade Placentalia – but only Mammalia and Theria are in the table. Legitimate arguments might arise if the commonly used clades Eutheria and ...

3. Class (biology) - Wikipedia

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

   In biological classification, class (Latin: classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. It is a group of related taxonomic orders. [a] Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class ranking between phylum and order. [1]

4. Kingdom (biology) - Wikipedia

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

   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] But the division of prokaryotes into two kingdoms remains in use with the recent seven kingdoms scheme of Thomas Cavalier-Smith, although it primarily differs in that Protista is ...

5. Taxonomy (biology) - Wikipedia

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

   In biology, taxonomy (from Ancient Greek τάξις () ' arrangement ' and -νομία () ' method ') is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics.

6. Biotic index - Wikipedia

   en.wikipedia.org/wiki/Biotic_index

   Then an identification key is used to help determine which category or group the organism belongs in and allows a numerical value be assigned to that organism. A worksheet is then used to calculate the final value or score of all the organisms found. Depending upon the worksheet's equations, the score determines the condition of the water quality.

7. Order (biology) - Wikipedia

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

   It is classified between family and class. In biological classification , the order is a taxonomic rank used in the classification of organisms and recognized by the nomenclature codes . An immediately higher rank, superorder , is sometimes added directly above order, with suborder directly beneath order.

8. Protein superfamily - Wikipedia

   en.wikipedia.org/wiki/Protein_superfamily

   Conversely, the individual families that make up a superfamily are defined on the basis of their sequence alignment, for example the C04 protease family within the PA clan. Nevertheless, sequence similarity is the most commonly used form of evidence to infer relatedness, since the number of known sequences vastly outnumbers the number of known ...

9. Colony (biology) - Wikipedia

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

   In biology, a colony is composed of two or more conspecific individuals living in close association with, or connected to, one another. This association is usually for mutual benefit such as stronger defense or the ability to attack bigger prey.