Question

Water moves up against gravity and even for a tree of 20 m height, the tip receives water within two hours.The most important physiological phenomenon which is responsible for the upward movement of water is

• A. Cohesive forces
• B. adhesive forces
• C. transpiration pull
• D. root pressure

Answer 1

The correct option is C

transpiration pull

The suction pressure created due to transpiration is very high, almost 120 bars and explains the ascent of sap in very tall trees.