Question

Stomata which remain closed during night and open only during the day for a few hours are of

• A. Barley or cereal type
• B. Alfalfa type
• C. Lucerne type
• D. Potato type

Answer 1

The correct option is A Barley or cereal type

Stomata open during day and close at night. There are five categories according to their daily movement. These are alfalfa type, barley type, potato type, equisetum type and succulent type. In barley or cereal type, stomata remain open only for a few hours in day and remain closed in rest period. In alfalfa or lucerne type, stomata remain open during the day and close during night. In potato type, stomata remain open during day and night except few hours in evening.

Thus, the correct answer is option A.