Question

Why is the epidermis present as a thick waxy coating of cutin in desert plnt?

Answer 1

here is your answer.
cutin is a waxy water proof chemical present on the epidermis. As desert plants do net get much, so cutin is present to minimise transpiration.

Answer 2

Cutin is a waxy layer . As desert plant does not get more amount water as other plant get . So when they find water they store is in their stem or leaves by which they regulate their function . Thus Cutin is waxy layer it minimize the rate of transpiration that they can loss a less amount of water . And store it in the form of wax or mucous.

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