1. Mayank found a slide in the laboratory without a label. When he viewed it under a microscope, he saw that it had cells with a thick cell wall and a large empty space. Which cell could he have viewed? Is it a plant cell or an animal cell? What do you think is the large empty space he saw inside the cell?

Answer: Mayank most likely viewed a plant cell. Plant cells have a thick cell wall, which animal cells lack. The large empty space he observed inside the cell is the vacuole. In mature plant cells, the vacuole is often very large and filled with cell sap, which can make it appear as a clear, empty space under the microscope.

2. When Pooja viewed a small piece of her cheek scrape under a microscope, she was unable to see anything clearly. Do you think she could add something to make the cells clearly visible?

Answer: Yes, Pooja could add a stain or dye to make the cells clearly visible.
Biological stains, such as methylene blue or iodine, can be used to colour specific parts of the cell. Since cheek cells are mostly transparent, staining them will highlight structures like the nucleus and cell membrane, making the cells easier to see under the microscope.