Question

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

Answer 1

Epidermis:

1. The epidermis is present as a thick waxy coating of cutin in desert plants because the desert plants are located in high temperatures where water is scarce.
2. To prevent loss of water through transpiration(loss of water from the aerial parts of plants) or evaporation, the desert plants have modified their leaves into spines, and the epidermis is present as a thick waxy coating of cutin.