| List-I | List-II | ||
| A. | Cellular level
 | P. | Similar cells grouped to perform a common function |
| B. | Tissue level | Q. | Functional coordination of multiple organs
 |
| C. | Organ level
 | R. | Cells show division of labour without tissue formation
 |
| D. | Organ-system level | S. | Tissues organised to perform specific functions |