Question

What can you see ? (long rows of rectangular cells in the unstained onion peel)

Answer 1

Long rows of rectangular cells are epithelial cells which perform the function of storage of nutrients.

Answer 2

We can see cell wall, cytoplasm, and nucleus under low magnification.  

Explanation:

• Some rectangular structure or brick-like structure of Onion peel are found under a microscope,these are onion cells. And within cells some dots are visible, these are cell nuclei.  
• Under low magnification (40X) of the onion peel,  approximately 100 of onion cells are visible.   After increasing the magnification, less number of cells are visible, but the cells are more clear and larger than before.

• There is no space between two onion cell, they positioned beside each other and formed a net-like pattern.

We can see cell wall, cytoplasm, and nucleus under low magnification.