Q29 / 180 · NEET 2015 (Phase 2) · Botany

Root pressure is usually acidic because:

  • A
    Low osmotic potential in soil
  • B
    Passive absorption
  • C
    Increase in transpiration
  • Correct answer
    D
    Active absorption

Solution

As various ions from the soil are actively transported into the vascular tissues of the roots, water follows and increases the pressure inside the xylem i.e., root pressure (positive pressure). The absorption of various ions, make the solution acidic.

Hence, the correct answer is option: 'D'.

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