Question

4. Manik saw his father watering his garden plants in hot weather. He noticed that

water doesn’t stick to the plant leaves and leaves become dry but looked fresh. He asked

following questions to his teacher

a. Which tissue forms the outer covering of a plant and does it have a protective role

to play?How ?

b. Why does water not stick to the leaves?
​

Answer 1

Answer:

a. because there is a wax coating layer in surface of leaf

b.normally the water get inside the plant from root. Roots absorb water from soil and passes to all parts of tree.

Answer 2

• a. The epidermis is a plant's outermost layer of tissue. It helps stop water loss through evaporation and acts as a shield for the plant. The guard cells in the epidermis are specialised cells that control the opening and shutting of the stomata, or small holes, on the leaves. These stomata minimise water loss while permitting gas exchange, which is necessary for respiration and photosynthesis.

• b. The waxy cuticle that covers the epidermis' surface prevents water from adhering to plant leaves. The hydrophobic (water-repelling) component of this cuticle is called cutin. By transpiration, which is the process through which water evaporates from the plant's surface, the cuticle aids in preventing water loss. The cuticle helps to keep the leaves dry by deflecting water, which keeps them from becoming waterlogged, which could disrupt gas exchange and photosynthesis.

• In conclusion, the epidermis of plants functions as a protective barrier and aids in controlling gas exchange and water loss. For plants to survive and flourish, there must be a waxy cuticle on the epidermis' outer surface to help keep the leaves dry and stop water loss.

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