Question

Stomata tend to close during hot period and open during cooler hours in

• A. Potato type
• B. Barley type
• C. Cereal type
• D. Lucerne type

Answer 1

The correct option is D Lucerne type

Stomata open during day and close at night. There are five categories on the basis of daily stomatal 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. In equisetum type, stomata seldom close. In succulent type, stomata remain open during cooler hours and closed during hot period.

Thus, the correct answer is option D.