$(i)$ Draw a diagram of the epidermis of a leaf showing the surface view and label the stomata,guard cells,and epidermal cells.
$(ii)$ Answer the following:
$(a)$ How is the epidermis of plants living in very dry habitats adapted?
$(b)$ Write the functions of guard cells of stomata in the leaf.

(N/A) $(i)$ The diagram should show a layer of tightly packed epidermal cells with stomatal openings surrounded by two bean-shaped guard cells.
$(ii)$ $(a)$ Plants living in very dry habitats have a thick,waxy,and water-resistant layer of cutin on their epidermis. This adaptation helps in preventing excessive water loss through transpiration,protecting the plant from mechanical injury,and preventing parasitic invasion.
$(b)$ The primary function of guard cells is to regulate the opening and closing of the stomatal pore. When water enters the guard cells,they become turgid and swell,causing the stomatal pore to open. Conversely,when water leaves the guard cells,they become flaccid and shrink,causing the stomatal pore to close.