Micro-organism:
They are small organisms and are either microscopic or submicroscopic creatures.
Differences between prokaryotic (bacteria) & eukaryotic (human) cell:
| Traits | Prokaryotic | Eukaryotic |
| 1. Size | Smaller | Larger |
| 2. Nucleus: Nuclear membrane, Nucleoli Chromosome | AbsentSingle | Present Multiple |
| 3. Mitotic division | No | Yes |
| 4. Membrane bound organelles (e.g. mitochondria) | Absent | Present |
| 5. Plasmid | Present | Absent |
| 6. Ribosome | 70S (30S+50S) | 80S (40S+60S) |
| 7. Cell wall containing peptidoglycan | Yes | No. |