Which is not a category of classification in biology.

Correct answer: A. ecotype

  • A. ecotype
  • B. Species
  • C. Genus
  • D. Order

Explanation

Species, genus and order are formal ranks in the taxonomic hierarchy. An ecotype is a genetically adapted population within a species, not a standard taxonomic rank; students may choose species because it is the smallest common rank, but species is definitely a classification category.

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