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Define the cohesion-tension theory? 

Difficulty: Medium

Cohesion-tension theory:

The theory states that the force which carries water (along with dissolved salts) upward through the xylem is the transpirational pull

  1. According to this theory the mechanism by which water (along with dissolved materials) is carried upward through the xylem is transpirational pull
  2. ii. Transpiration creates a pressure difference that pulls water and salts up from their roots.
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