Question

What is the basis of modern classification?

CLASS - XI BIOLOGY (Biological Classification)

Answer 1

they ussualy use the classification system made by Carolous Linneas kingdom, phylum, class, order , family, genus, species

Answer 2

since it is nearly impossible to study all the living organisms , it is necessary to devise some means to make this possible . so, on this basis modern classification  is  made up..  
and CLASSIFICATION -  classification is the process by which anything is grouped into convenient categories based on some easily observable characters.
 for example , we can recognize groups such as plants or animals .