STD 11 - 1. The living world — NEET STD 11 Science — Question

a
Taxonomical hierarchy (introduced by Linneaus) is arrangement of various taxonomic levels in the descending order, starting from kingdom upto species. The hierarchy indicates the various levels of kinship. The number of similar characters of categories decreases from lowest rank to highest rank i.e., from species to kingdom. Thre are 7 obligate categories which constitute taxonomical hierarchy. In addition to these obligate categories there are some optional categories are as follows. e.g., Tribe, subclass, superclass, etc.