Question

Water absorption by root hair occurs until

• A. Concentration of water in the cell sap is higher
• B. Salt concentration in cell sap is higher
• C. They are separated from the soil by a selectively permeable membrane
• D. Water potential is lower

Answer 1

The correct option is D Water potential is lower

• Water potential is the measure of the relative tendency of water to move inside or outside the cell.
  
• Movement of water will be from high to low concentration.
• This term was first coined by Slatyer and Taylor in the year 1818.
  

So, the correct answer is 'Water potential is lower'.