Question

In active non-osmotic absorption of water the OP of the cell sap of root hairs is .............. than / to OP of the soil water.

• A. Higher
• B. Lower
• C. Both A and B
• D. Equal

Answer 1

The correct option is B Lower

Active absorption means absorption against the concentration gradient, i.e., movement of water molecules from a region of lower concentration (higher OP) to a region of higher concentration of water molecules (lower OP). In this case, the cell sap of root hair cells will be lower and they will be having lesser OP as compared to the soil solution. However, lost of the water absorbed by plant roots is through passive absorption under the influence of transpiratory loss of water.