Question

Transpiration in tall trees occur through:

• A. Stomata
• B. Bark of the tree
• C. Lenticles
• D. Cuticle

Answer 1

The correct option is C

Lenticles

The correct option is C:

Explanation of the correct option:

1. Transpiration is the loss of water in the form of water vapour from the aerial parts of the plants.
2. It can occur through stomata which are the small pores on the surface of leaves.
3. In old woody tall trees, transpiration mostly occurs through the small pores called lenticels which occur on the stems of the trees.
4. Lenticels are permanently open pores on the bark of old trees that helps in the gaseous exchange.

Explanation of the incorrect options:

Option B:

1. Transpiration through stomata occurs in the leaves and stems of small young trees.

Option C:

1. The bark is dead tissue and does not contain water. Therefore transpiration cannot occur through the bark.

Option D:

1. The cuticle is the waxy layer on the surface of leaves that carries out cuticular transpiration.
2. In tall trees, transpiration does not occur through cuticles.

Final answer: Transpiration in tall trees occur through lenticels.