Q.68. Choose the correct taxonomical hierarchy among the following:
(A) Species, Genus, Family, Order, Class, Phylum, Domain
(B) Species, Genus, Order, Class, Family, Phylum, Domain
(C) Species, Genus, Order, Family, Class, Phylum, Domain
(D) Species, Genus, Family, Class, Order, Phylum, Domain
The correct taxonomical hierarchy starts from the most specific level, species, and ascends to the broadest, domain. Among the options, (A) Species, Genus, Family, Order, Class, Phylum, Domain matches this standard order used in biological classification.
Why Option (A) is Correct
This sequence follows the modern eight-level taxonomic system from lowest (most specific) to highest (broadest): species groups into genus, then family, order, class, phylum, and domain. Developed from Linnaeus’s original seven levels with domain added later based on genetic data.
Species represents organisms that interbreed; higher levels group based on shared traits, with domain (e.g., Bacteria, Archaea, Eukarya) as the top rank.
Analysis of All Options
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(A) Species, Genus, Family, Order, Class, Phylum, Domain: Correct ascending order matching standard biology taxonomy.
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(B) Species, Genus, Order, Class, Family, Phylum, Domain: Incorrect; skips family after genus and places order before family, disrupting the hierarchy where family precedes order.
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(C) Species, Genus, Order, Family, Class, Phylum, Domain: Wrong; order comes after class, not before family, and class follows order in proper sequence.
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(D) Species, Genus, Family, Class, Order, Phylum, Domain: Flawed; class precedes order, but here order follows class incorrectly—standard is family to order to class.
Taxonomic Hierarchy Overview
Taxonomy organizes life hierarchically for identification and study. Mnemonic “Dear King Philip Came Over For Good Soup” aids recall: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species (reverse of query). This system, updated post-1990s with domains, supports fields like genetics and biodiversity.
