Which groupings of organisms are ordered from most diverse to least diverse?

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Insects are the most diverse group with over a million described species. Plants and fungi are also very diverse with hundreds of thousands of described species each. Vertebrates (which includes mammals, birds, reptiles, fish, and amphibians) have around 70,000 described species. Bacteria are extremely diverse, but they are generally not classified into distinct species in the same way that eukaryotes are, so it is difficult to compare their diversity.

Which Groupings of Organisms Are Ordered from Most Diverse to Least