Question
Biology Question on Nomenclature and taxonomy
The ascending or descending arrangement of taxonomic categories is called as
A
classification
B
taxonomy
C
hierarchy
D
key
Answer
hierarchy
Explanation
Solution
Hierarchy of categories is the classification of organisms in a definite sequence of categories (taxonomic categories) in a descending order starting from kingdom and reaching upto species or an ascending order from species to kingdom. The number of similar characters of categories decreases from lowest rank (species) to highest rank (kingdom). The taxonomic hierarchy includes seven obligate categories-kingdom, division or phylum, class, order, family, genus and species. Some subcategories like tribe, subfamily, subspecies are also used whenever required. Fig: Taxonomical hierarchy showing arrangement in ascending order