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Solution:
The correct option is (4).
The girdling experiment demonstrates the importance of the phloem tissues. Phloem tissues help in the conduction or translocation of food (glucose). When a stem is girdled (phloem is removed) the movement of food materials gets blocked, and the trunk portion starts swelling due to the accumulation of food materials.
The correct option is (4).
The girdling experiment demonstrates the importance of the phloem tissues. Phloem tissues help in the conduction or translocation of food (glucose). When a stem is girdled (phloem is removed) the movement of food materials gets blocked, and the trunk portion starts swelling due to the accumulation of food materials.