Question

Diagrams of cells of an onion peel were labelled by four students as given below. The correctly labelled diagram is
(a) nucleus, cytoplasm,
(b) nucleus, vacuole
(c) vacuole, nucleus
(d) cytoplasm, vacuole.​

Answer 1

Answer:

Explanation:

a) nucleus, cytoplasm

1. A large number of rectangular cells with distinct cell wall can be observed.

2. Cytoplasm is seen as thin layer of deep coloured substance on inner surface of cell wall.

3. A big central vacuole is present in the cell.

4. A deeply stained round body called nucleus is seen in each cell.

5. The epidermal peel of onion comprises of rectangular shaped cells. Each cell comprises of a nucleus, a central vacuole, thin layer of cytoplasm and cell wall.

6. As cell walls and large prominent vacuole are present in each cell, the cells placed under observation are plant cells.