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Student found a wooden stopper in lab. He was told by an old lab attendant that it is there for many years. He kept thinking how it did not rot? |
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Answer» 1. Wooden stopper or cork is obtained from the phellem (cork) part of a bark. 2. Phellem (cork) is impervious in nature and does not allow entry of water due to suberized walls. 3. Due to this it does not rot and remains as it is for many years. |
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