Question

Root pressure theory was supported by

• A. Dixon
• B. Stephen Hales
• C. Levitt
• D. Sachs

Answer 1

The correct option is B Stephen Hales

Root pressure theory was proposed by Prisetley and supported by Stephen Hales. Root pressure is defined as the pressure created in the xylem of the roots when the rate of absorption is greater than the rate of transpiration. The xylem sap is hypertonic to the water present in the soil as the xylem sap has high concentration of ions. This difference in the concentration allows the movement of water from high concentration in the soil to the low concentration in the roots which creates a hydrostatic pressure in the roots known as root pressure.

So, the correct answer is option B.