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How many main obligate categories are there in the taxonomic hierarchy of the living world?

Answer and explanation

Correct answer: Seven

Correct answer: B, seven. The seven main obligate categories, from the broadest to the most specific, are Kingdom, Phylum or Division, Class, Order, Family, Genus, and Species. In zoology, Phylum is used, while Division is commonly used for plants. Option B is correct because it counts all seven principal ranks. Option A omits two categories, option C adds categories that are not part of the standard main seven, and option D is far too few. The sequence from broad to narrow is Kingdom → Phylum/Division → Class → Order → Family → Genus → Species. A memory aid is K-P-C-O-F-G-S: “King Philip Came Over For Good Soup.” Do not confuse the seven main categories with additional intermediate ranks.

Related tags

Taxonomic HierarchyClassification RanksKingdomSpeciesTaxonomyBinomial NomenclatureTaxonomy Binomial NomenclatureThe Living WorldBiology

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