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      Question

      Root pressure is developed due to

      _____
      A Active absorption Correct Answer Incorrect Answer
      B Passive absorption Correct Answer Incorrect Answer
      C Increase in transpiration Correct Answer Incorrect Answer
      D low osmotic potential Correct Answer Incorrect Answer

      Solution

      Due to active absorption of minerals, high osmotic potential is created. To reduce osmotic potential, water is absorbed, and hence, water potential is increased inside the xylem. Increased water potential also increases pressure in the xylem and this positive pressure is known as root pressure.

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