Traditional taxonomy uses a
hierarchical classification where organisms are placed into
progressively more restricted groups (taxa).
Starting from the most comprehensive taxon, Linnaeus classified
organisms into kingdom, phylum, class, order, family, genus, and
Leopards and humans belong to kingdom Animalia, phylum Chordata, class
While leopards are in order Carnivora, humans are in order Primates.
A taxon above kingdom called domain was added after Linnaeus proposed
these 7 levels.