AP BIOLOGY

Detailed explanation-1: -The stem is covered with a thick layer of waxy substance, which helps to prevent evaporation of water.

Detailed explanation-2: -Thick, waxy cuticle – having leaves covered by a thickened cuticle prevents water loss from the leaf surface. Stomata in pits – having stomata in pits, surrounded by hairs, traps water vapour and hence reduces transpiration.

Detailed explanation-3: -Wax acts as a protective coating on the epidermis of leaves, stems, and fruits, reducing desiccation or abrasion, or resisting pest attack.

Detailed explanation-4: -The waxy cuticle is a thin layer atop the epidermis. Its function is to reduce the water lost from the leaf.

Detailed explanation-5: -It has long been believed that suberin, a waxy substance between some plant cells, acts as a barrier for the movement of water in a plant’s roots.