Question

Which one is against the theory of ascent of sap by Dixon and Joly?

• A. Pores in tracheary elements
• B. Cohesion force of water molecules
• C. Adhesion force of water molecules
• D. Requirement of ATP

Answer 1

The correct option is D Requirement of ATP

Dixon and Joly gave the theory that ascent of water in the plant through pored tracheary elements of xylem which uses cohesion-tension, transpiration pull and suction pressure developed in the leaf cells.

According to this theory, there is no use of energy or ATP for the ascent of the sap.

So, the correct answer is 'Requirement of ATP'.