Question

Exudation of xylem sap on cutting of a shoot is due to

• A. Gutttation
• B. Root pressure
• C. Transpiration
• D. None of the above

Answer 1

Answer: (B)

Root pressure

(A) Guttation is the secretion of droplets from the pores of the tree.

(B) When stem base is cut xylem sap releases and it is due to root pressure [It push the xylem sap upward so when we cut stem base the pulling force of root pressure works].

(C) Transpiration is the evaporation of water from the upper surface of the leaves.

So, the correct answer is 'Root pressure'.