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Question

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

A
Imbibition
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B
Plasmolysis
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C
Transpiration
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D
Root Pressure
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Solution

The correct option is D Root Pressure
Root pressure (positive pressure) can be responsible for pushing up water to small heights in the stem. It also 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. Imbibition is the adsorption leading to absorption of water by hydrophillic substances. Plasmolysis is the shrinking of the cell membrane and cytoplasm when a cell is undergoing exosmosis. The loss of water in the form of water vapor from the aerial parts of the plant is called transpiration.

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