What is Class (biology)?
[[File:Scientific classification.svg|right|100px|The hierarchy of scientific classification]] A '''class''' is a rank used in the [[biology|biological]] [[taxonomy]] of all [[organism]]s. Each class is split into [[Order (biology)|orders]]. There are multiple classes in each [[phylum]]. [[Mammal]]s, for example, are one of several classes within the [[Vertebrate]]s, and are subdivided into [[Monotreme]]s, [[Marsupial]]s, and [[Eutheria]]. Ranks below class and above order are often used. Then the sequence is: *'''Class''' *'''Subclass''' *'''Infraclass''' *'''Order''' {{-}} {{taxonomic ranks}} [[Category:Taxonomy]] {{biology-stub}}