Classical approach-

The classification is based on numerous properties: morphological, cultural, nutritive, biochemical, physiological, serologic, bacteriophage succeptibility pathogenic and genetic properties of organism.
Adansonian approach-
It resembles the classical approach in that a large number of charecteristics are determined for each organism of a group, but each phenotypic characteristics is given equal merit rather than placing more weight on some characteristics than on others.