Q40. The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in the early morning is

Solution:
The root pressure and can be responsible for pushing up water to small heights in the stem.
Effects of root pressure can be observable at night and early morning when evaporation is low, and excess water collects in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbaceous parts. Such water loss in its liquid phase is known as guttation.