Question

Maximum transpiration occurs through

• A. Stomata
• B. Cuticle
• C. Lenticels
• D. Bark

Answer 1

The correct option is A

Stomata

The correct option is A:

Explanation of the correct option:

1. Transpiration is the evaporation of water from the stomata of the plants which are nothing but small pores.
2. The maximum amount of water is evaporated from the stomata only.
3. The evaporation taking place this way helps in the movement of water from the roots to the leaves.
4. When the stomata are open the water collected near the stomata changes into vapor and evaporates.

Explanation of the incorrect options:

Option B.

1. A cuticle is a protective covering over the epidermis of the leaf, young shoots, and other aerial plant organs.
2. It has no function of transpiration and helps in protection only.

Option C:

1. These are the raised pores in the stem of a woody plant.
2. Their function is the exchange of gases between the atmosphere and the internal tissue.
3. They have very minor or no function in transpiration.

Option D:

1. The bark is the outermost layer of stems and roots of woody plants.
2. It is dead tissue and is not involved in transpiration and only helps in the protection of the stem.

Final answer: Maximum transpiration occurs through stomata.