Which is the most species-rich taxonomic group?

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Editor">Editor Staff asked 2 weeks ago

Which is the most species-rich taxonomic group?
 
(a) Molluscs
 
(b) Crustaceans
 
(c) Echinoderms
 
(d) Insects
 
The question was posed to me in an interview for job.
 
My doubt stems from Biodiversity in division Biodiversity and Conservation of Biology – Class 12

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Editor">Editor Staff answered 2 weeks ago

Correct choice is (d) Insects
 
The best I can explain: Among animals, insects are said to be the most species-rich taxonomic group. Insects are hexapod invertebrates belonging to phylum Arthropoda. Out of all known animal species, 70 percent is comprised of insects.