expression, noun
biological classification
Refers to the scientific classification of living organisms; synonymous with 生物分類.
See also: 生物分類
生物の分類は、界・門・綱・目・科・属・種の階層で行われる。
Biological classification is carried out in the hierarchy of kingdom, phylum, class, order, family, genus, and species.
Synonymous; 生物の分類 is a slightly more explicit phrase with the possessive の, while 生物分類 is a compound noun.
Compound of 生物 (living thing) + の (possessive particle) + 分類 (classification).