$(i)$ What is epidermis?
$(ii)$ List three functions of epidermis.

(N/A) $(i)$ Epidermis is the outermost single layer of cells that covers all parts of the plant externally.
$(ii)$ Functions of epidermis:
$(a)$ Protection: It protects the plant against water loss,mechanical injury,and invasion by parasitic fungi.
$(b)$ Secretion: Epidermal cells on the aerial parts of the plant often secrete a waxy,water-resistant layer (cuticle) which further helps in protection from mechanical injury and water loss.
$(c)$ Absorption: Root hairs present on the epidermis of roots help in the absorption of water and minerals from the soil.