Question

The stomata are called sunken when

• A. Guard cells are in the line with epidermal cells.
• B. Guard cells are situated below epidermal cells.
• C. Guard cells are situated above epidermal cells.
• D. Guard cells occur under epidermal cells.

Answer 1

The correct option is B Guard cells are situated below epidermal cells.

Each stoma remains surrounded by two kidneys or bean shaped epidermal cells called guard cells. A sunken stomata is a stomata in a small pit, that is the stomata are embedded into the leaf layers rather than on the surface of the leaves. As the stomata are below epidermal cells, the guard cells surrounding it are also present below epidermal cells.

Thus, the correct answer is option (B).