Question

Transport of water and salt is mediated by

• A. Xylem
• B. Sieve tubes
• C. Sclerenchyma
• D. Phloem

Answer 1

The correct option is A Xylem

The ascent of sap occurs in plants under the influence of transpiration. Transpiration generates tension in plants, which provides the pulling force. A continuous column of water is maintained in xylem tracheids and vessels due to the forces of adhesion and cohesion. Thus, the rise of water and minerals in xylem is a physical process, which does not require any living cells. This process occurs in xylem tissue. Translocation of sugars in plants is a physiological process, which occurs in living cells of phloem tissue.

So, the correct answer is option A.