BUSINESS ADMINISTRATION
FINANCIAL ACCOUNTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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i and iv
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ii and iii
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iii and iv
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all above
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Detailed explanation-1: -The cohesion-tension theory (C-T theory) by Boehm (1893) and Dixon and Joly (1894) postulates that the water ascent in trees is exclusively due to the transpirational pull from continuous water columns in the xylem conduit running from the roots to the leafs.
Detailed explanation-2: -The theory states that transpiration pull or tension, cohesion property of water, and hydration of the cell walls (i.e., adhesion) are collectively responsible for the ascent of sap. Water movement through the xylem is a bulk flow caused by p (pressure difference) between one end of the system and the other.
Detailed explanation-3: -The upward movement of water is due to the strong force of attraction between the water molecules which cannot be broken easily. This is called force of cohesion. There exists a force of adhesion between the water and the walls of the xylem.
Detailed explanation-4: -Cohesion tension theory says that the movement of water in the upwards direction against gravity is guided by the attractive forces between the particles of water which is known as cohesion.