Question

1. Why desert plants have thick coating of cutin on epidermis​

Answer 1

Explanation:

The main adaptation of desert plants is to minimise the water loss. Hence, layer of cutin is present on epidermis, which is a thick waxy coating. This waxy coating helps in minimising water loss by transpiration.

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Answer 2

The thick coating of cutin and epidermis helps the plant to not release excess of water in the hot and unsustainable climate of a desert.

This coating ensures a minimum amount of loss of water from the plant and hence helps them sustain for a longer period of time.