What is the main difference observed between a slide of human cheek cells and a slide of onion peel when viewed under a compound microscope?

Correct option is B

​The correct answer is (b) Presence of cell wall in onion peel cells

Explanation: The main difference observed between a slide of human cheek cells and a slide of onion peel cells when viewed under a compound microscope is the presence of the cell wall in onion peel cells.

Information Booster:

1. Cell Wall:

• Onion Peel Cells: Onion cells are plant cells and have a rigid cell wall made of cellulose, which provides structure and protection. This cell wall is clearly visible under the microscope, giving the cells a more defined, rectangular shape.
• Human Cheek Cells: Human cheek cells are animal cells, and animal cells do not have a cell wall. Instead, they have a flexible cell membrane. The absence of a cell wall makes cheek cells more irregular in shape and less rigid compared to plant cells.

• Onion Peel Cells: Due to the presence of the cell wall, onion peel cells tend to have a rectangular or box-like shape.
• Human Cheek Cells: The human cheek cells, without a cell wall, appear more irregular or oval-shaped.

• Both cells contain a nucleus, cytoplasm, and other organelles. However, the presence of the cell wall in onion peel cells is the most prominent difference when viewed under a microscope.