Unicellular Organisms :-
1. The body of organisms is made up of composed of cell.
2. Division of labour is at organelle level.
3. Great capacity to regenerate.
Ex- Amoeba & Euglena.
Multi-cellular Organisms :-
1. The body of organisms is made up of numerous cells.
2. Division of labour is at cellular, tissue , organ or organ system level.
3. Its capacity to regenerate decreases with the increase of specialization.
Ex- Humans etc..