Practical purpose of taxonomy or classification is to:
| 1. | facilitate the identification of unknown species |
| 2. | explain the origin of organisms |
| 3. | know the evolutionary history |
| 4. | identify medicinal plants |
Biosystematics aims at:
| 1. | The classification of organisms based on broad morphological characters |
| 2. | Delimiting various taxa of organisms and establishing their relationships |
| 3. | The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies |
| 4. | Identification and arrangement of organisms on the basis of cytological characteristics |