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

1. Root pressure
2. Imbibition
3. Plasmolysis
4. Transpiration

Correct answer: Root pressure

Solution

Root pressure is the positive pressure generated in roots that can force water out through leaf tips or margins as droplets, especially at night or early morning. This is the process behind guttation, not transpiration.

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