What is a group of organisms actually found in nature in a taxonomic hierarchy called?

Correct answer: Taxon

Direct answer: A, Taxon. In biology, a taxon is a real group of organisms placed together at any rank of classification. The group may be very small, such as a species, or broad, such as a kingdom. Taxonomy arranges organisms in ranks such as species, genus, family, order, class, phylum and kingdom. A taxon is the actual biological group occupying one of these ranks; a category is only the rank or level itself. A is correct because a species, genus, family or kingdom can each be called a taxon when it represents a real group of organisms. B is wrong because category means a level of the hierarchy, not necessarily the organisms occupying it. C is wrong because order is only one particular rank and is not the general term for every biological group. D is wrong because kingdom is one broad taxon, not the name for all such groups. Memory cue: category is the place or rank; taxon is the real group placed there.