Question

……………………….. are found on leaves for the exchange of gases.Fill in the blank and give reasons.

Answer 1

stomata are found on the leaves for the exchange of gases because they are the tiny pores through which oxygen can leave the plants and carbon dioxide can enter

Answer 2

Answer:

Stomata are found on leaves for the exchange of gases.

Explanation:

Every plant leaf has a number of small pores or openings on underneath of the leaf blade. These pores are called stomata and are guarded by two specialised cells called ‘guard cells’. These cells are ‘kidney’ shaped and can close and open with respect to the need of the plant.  

When the plant needs carbon dioxide these guard cells stretch open allowing the gas to enter. Carbon dioxide is needed by the plant for the process of ‘photosynthesis’ which helps it to prepare food.