Q50 / 164 · NTA Abhyas (NEET) 2020 · Botany · Transport in Plants

Root pressure is maximum when

  • A
    transpiration is high and absorption is low.
  • Correct answer
    B
    transpiration is very low and absorption is high.
  • C
    both are very high.
  • D
    both are very low.

Solution

The positive pressure in the plants responsible for pushing up water in the stem is known as root pressure. The root pressure is observed maximum in the night or early morning when the evaporation is low and the water absorption is high due to excessive collection of water. Root pressure provides a push in the overall process of water transportation in plants.

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

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