Question

Active absorption of water from the soil by the root is mainly affected by

• A. Typical tissue organisation
• B. Respiratory activity of root
• C. Tension on cell sap due to transpiration
• D. None of the above

Answer 1

Answer: (B)

Respiratory activity of root

Active absorption means absorption against the concentration gradient. To move any substance such as solute or solvent against the concentration gradient, energy input is required. Energy is obtained from cellular respiration activity in the roots. Thus, the correct answer is option B.