Answer:
The main basis of classification of living organisms are:
- Cell type: whether prokaryote or eukaryote
- Cell wall: present or absent and contents of cell wall (cellulose or noncellulose)
- Body organization: unicellular, multicellular, tissue, organ, or organ system
- Mode of nutrition: autotroph (chemosynthetic or photosynthetic) or heterotroph (saphrophyte, parasite, holozoic et cetera)
- Reproduction: Sexual or asexual
Based on these observations the organisms are classified into 6 kingdoms namely:
- Archaebacteria
- Eubacteria
- Protista
- Fungi
- Plantae
- Animalia
