SALE TODAY: Learn Piano on iOS bit.ly Mahalo biology expert Mary Poffenroth explains the classification system of species and the taxonomic hierarchy. The Taxonomic Hierarchy --------------------------------------------------------------------- In biological taxonomy, all life forms can be classified within a hierarchal system that orders them from the broadest, most inclusive categories to the narrowest, most exclusive. The most widely used conventional categories are domain, kingdom, phylum, class, order, family, genus and species.www.biology-online.org This taxonomic system was initially pioneered by Carl Linnaeus in the 18th century. Linnaeus used Latin terms to arrange species according to observable similarities and differences in their physical morphology. With recent innovations in molecular biology, the traditional classification system has been made more precise by the possibility of going beyond superficial similarities and mapping similarities and differences between species at the genetic level. Following this hierarchy, the highest level, domain, distinguishes between bacteria and organisms with a true cell nucleus. The next level down, kingdom, distinguishes plants from animals. Below the kingdom level, at the level of phylum, we can differentiate between vertebrates and creatures with no backbone. Among the vertebrates, you can differentiate mammals from birds, fish and reptiles at the class level. Among mammals, you can differentiate between ones that eat ...
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