Question

The stomata in some plants are sunken.

Answer 1

Stomata:

1. The pores on the leaves that enable gaseous exchange and transpiration are called stomata.
2. The opening of stomata is regulated by the guard cells.

Sunken stomata:

1. The stomata that are not directly exposed to a leaf's surface and remain in small pits are called the sunken stomata.
2. Sunken stomata reduce water loss in plants.
3. Sunken stomata is an adaptation to reduce transpiration in plants living in xerophytic conditions like Nerium.