Question

What is present on the surface of the leaves which helps the plant prevent loss of water but is absent in roots?

Answer 1

Stomata are present on the surface of leaf

Answer 2

Plants can lose water through leaves and this loss is major when considering the number of leaves and the amount of water lost due to evaporation under sunlight.

Cuticles are present on the leaves of plant to prevent loss of water but it is absent on the roots of the plants.