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Question : According to imbibition theory I. ascent of sap could takes place by imbibition through the walls of xylem. II. Water can rise through the wall due to imbibitional pressure upto a certain height only. III. The pressure at the transpiring surface falls below that of atmsophere. IV. rate of transpiration is roughly equal to the rate of imbibition. |
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Answer» I and II |
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