Answer: Dermal tissues help plants on a hot day because It has a waxy material that prevents the loss of water to the environment.
Step-by-step explanation:
Dermal tissues is made-up of epidermal cells which are packed closely and secrete wax curticle which prevent water loss to the environment in the hot day. They deter excess water and entering of microorganisms and insects. It covers the plant and control gas exchange and water loss.