DENDROLOGY

Detailed explanation-1: -We’ve also learned that waxy cuticle is a water-resistant layer so can reduce water loss from the surface of the leaf. Therefore, the correct answer is (D). In plant leaves, the primary function of waxy cuticles is that they prevent excessive water loss by evaporation from the leaf.

Detailed explanation-2: -The plant cuticle is an extracellular hydrophobic layer that covers the aerial epidermis of all land plants, providing protection against desiccation and external environmental stresses.

Detailed explanation-3: -Thick waxy cuticle: The cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers temperature. Sunken stomata: Stomata may be sunk in pits in the epidermis; moist air trapped here lengthens the diffusion pathway and reduces evaporation rate.

Detailed explanation-4: -The cuticle is a waxy layer secreted by the epidermis on the two surfaces of the leaf. It serves to prevent evaporation of water from the leaf surface.

Detailed explanation-5: -Functions. The primary function of the plant cuticle is as a water permeability barrier that prevents evaporation of water from the epidermal surface, and also prevents external water and solutes from entering the tissues.