Question

The girdling or ringing experiment involved

• A. Tying a metallic ring to a stem
• B. Removal of a ring of tissue external to xylem
• C. Marking a ring shaped area on the stem
• D. None of the above.

Answer 1

Answer: (B)

Removal of a ring of tissue external to xylem

Girdling experiment is used to identify the tissue through which the food is transported. In this experiment, a ring of (phloem) is removed from the wood by a technique girdling. Since the woody xylem part remains intact, water and nutrient reach the leaves.
So the correct answer is 'Removal of a ring of tissue external to xylem'.