Nov 7, 2016
Hiearchy is ordering, while grouping is the separation based on similarities or dissimilarities.
- Hiearchy-It is an arrangement based on either ascending or descending order, such as Species---Genus---Family---Order---Division and vice versa.
- Classificatio-It is technique of grouping on the basis of similarities and dissimilarities. Different genera are kept in a family based on some similarities, while these genera itsel differentiated on the basis of dissimilarities.