HARITHA,Subject Matter Expert at Edumarz
Solution:
Stomata are the structures located in the epidermis of leaves
It also regulates transpiration and gaseous exchange in plants
Each stoma is formed of two bean-shaped cells called guard cells and it encloses the stomatal pore
The guard cells of grasses are dumb-bell in shape
The outer walls of guard cells located away from the stomatal pore are thin and the inner walls of guard cells located towards the stomatal pore are thick
The guard cells contain pigments called chloroplasts and they regulate the opening and closing of stomata
Some epidermal cells present close to the guard cells are specialised in their shape and size and are called subsidiary cells
The stomatal aperture, guard cells and the surrounding subsidiary cells together form the stomatal apparatus