Question

The waxy surface of floating leaves of the hydrophytes prevents
A. Respiration
B. Photosynthesis
C. Transpiration
D. Clogging of stomata

Answer 1

Hint: The waxy layer on floating plants also protects the leaves and stomata therein. The life-sustaining mechanism of any plant is like photosynthesis. The presence of this waxy coating protects the leaves and helps to preserve the same layer of photosynthetic cells, the mesophyll layer.

Complete answer:
Respiration is affected by high $C{O_2}$ derived from changes in the chemical composition of the plant. The mechanism by which green plants and many other species turn light energy into chemical energy is photosynthesis. For plants, water is essential, but the roots take up only a small amount of water. Transpiration loses the remaining $97 - 99.5$ percent.
Hydrophytes are those plants that live in the water and adapt to their environment. They either remain completely immersed in the water, such as Hydrilla, Valisineria, etc., or they remain under the water for much of their body parts.
A plant that is adapted to live either partially or entirely in waterlogged soil is immersed in water. Many hydrophytes, including the spiked water milfoil (Myriophyllum spicatum), which is fully submerged in water, consume water and gases over the entire surface and have no stomata.
Hydrophytes are plants that enjoy water. There are large leaves, stomata and waxy coatings on the upper surface of the floating hydrophytes. The waxy coating prevents stomata from wetting and clogging.

Hence, the correct answer is option (D).

Note: Plants need water to grow, and plants typically have the ability to absorb and maintain water during watering cycles to keep the plant alive. Many hydrophytes' mechanical and vascular tissue is reduced and protected by them. In their stems, roots and leaves, they also have wide intercellular air spaces to solve the challenge of getting gases from the water. Partially submerged hydrophytes, as in land plants, have hovering leaves with stomata from which gases may be swapped.