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Question: Which of the following is done during the ringing experiment? Option A- Bark is removed Option B...

Which of the following is done during the ringing experiment?
Option A- Bark is removed
Option B- Xylem is removed
Option C- Pith is removed
Option D- All the above

Explanation

Solution

The main aim of this experiment was to find that whether xylem or phloem tissue are involved in translocation or not. In this experiment removal of all the tissue bark, cortex, and phloem is performed.

Complete answer:
Ringing experiment is a strategy in which outer tissues of the stem are removed and only xylem and pith are safely left unharmed. With this experiment they observed that transportation of water was not disturbed at all but food transfer is disturbed and stops. A ring is made where outer tissues are removed and food stops at that ring and hence causes the formation of swelling. This swelling is because of accumulation of organic solutes that are not transferred to other parts of the plant due to phloem disruption. When the part below the girdle will not receive food it will die and soon the entire root and tree will also die.

Option A- Bark is removed- Yes, as already mentioned bark is removed of the plant or tree in this experiment. All the tissue outside the vascular cambium is removed so bark is also one of that tissue so it is removed.

Option B-Xylem is removed- No, in this ringing experiment xylem is left unharmed and thus water transportation is possible.

Option C-Pith is removed- Pith is not removed it is left unharmed like as xylem tissue.

Option D- All the above- No, all the above is not correct because out of the given option only bark is removed in this experiment not xylem or pith.

So our correct answer is Option A- Bark is removed.

Note: In a ringing experiment a ring is made where outer tissues are removed and food stops at that ring and hence cause the formation of swelling. This swelling is because of accumulation of organic solutes that are not transferred to other parts of the plant due to phloem disruption. When the part below the girdle will not receive food it will die and soon the entire root and tree will also die.