Practice question

Taxonomic hierarchy uses primary obligate ranks — Kingdom, Phylum, Class, Order, Family, Genus, Species — but codes recognize secondary ranks for refined phylogeny. Tribe (tribus) is inserted between family and genus, often with subtribe below it. A tribe assembles closely related genera sharing derived morphological, anatomical, and molecular characters that differentiate them from other genera in same family. For example, Fabaceae tribe Trifolieae unites Trifolium, Medicago and allies. Recognition of tribe improves resolution of evolutionary relationships without over-inflating family numbers. This pattern is frequently tested in NCERT-based competitive examinations requiring precise recall of taxonomic hierarchy principles.