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In biology, taxonomic rank (which some authors prefer to call nomenclatural rank [1] because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a taxon) in a hierarchy that reflects evolutionary
O-level logo. The General Certificate of Education (GCE) Ordinary Level, also called the O-level or O level, was a subject-based academic qualification.Introduced in 1951 as a replacement for the 16+ School Certificate (SC), the O-level would act as a pathway to the new, more in-depth and academically rigorous A-level (Advanced Level), in England, Wales and Northern Ireland.
The GCE is composed of three levels; they are, in increasing order of difficulty: the Ordinary Level ("O Level"); the Advanced Subsidiary Level ("A1 Level" or "AS Level"), higher than the O Level, serving as a level in its own right, and functioning as a precursor to the full Advanced Level; and; Advanced Level ("A Level").
The Cambridge O-Level has already been phased out and is no longer available in certain administrative regions. [3] There are some differences between O levels and IGCSE. The lowest achievable grade in O levels is E whereas in IGCSE G is the lowest. O levels curriculum have lesser coursework options than IGCSE [4]
Biological organisation is the organisation of complex biological structures and systems that define life using a reductionistic approach. [1] The traditional hierarchy, as detailed below, extends from atoms to biospheres .
As O Levels and CSEs had used different exam boards (except in Wales and Northern Ireland), new 'examining groups' were created. In England, the four examining groups were consortia of regional GCE and CSE exam boards, while in Wales and Northern Ireland they were the existing boards, making six boards in total: [ 9 ]
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. An order can also be defined as a group of ...
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]