What main force drives absorption of water causes negative pressure and draws water through the plant
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Transpirational pull is the force.
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Transpirational pull is the main force that drives absorption of water causes negative pressure and draws water through the plant.
According to Wikipedia, 'Transpirational pull: Similarly, the evaporation of water from the surfaces of mesophyll cells to the atmosphere also creates a negative pressure at the top of a plant. This causes millions of minute menisci to form in the mesophyll cell wall. The resulting surface tension causes a negative pressure or tension in the xylem that pulls the water from the roots and soil.'
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