Unique about the outer layer of the onion cell compared to the skin cell:
The presence of cell wall can be observed in onion cell while it lacks in the skin cell. The structure of the onion cell is like plant cell but in case of the human cell the structure is like animal cell. In case of the onion cell the outer layer has cellulose but when it comes to human skin cell the cellulose cell wall is absent. Due to the presence of cellulose the cell holds a definite shape but the human cell fails to maintain the shape as well as the rigidity. The presence of chloroplast can be marked in the onion cell and again is absent in the human cell.
