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Question
Who confirmed that the ascent of sap continues even when the continuity of water column is broken by overlapping cuts?
Who confirmed that the ascent of sap continues even when the continuity of water column is broken by overlapping cuts?
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Solution
The correct option is A MacDougal (1936)
The upward movement of water from the roots is called as the ascent of sap. MacDougal in 1936 put forward a hydrostatic system theory. According to this theory, the ascent of sap forms a continuous system through unthickened areas. Hence, blockage of few treachery elements does not break the continuity of water column. The water column is maintained by transpiration pull. Hence, the ascent of sap continues even when the continuity of water column is broken by overlapping cuts. According to him, the water column is maintained by cohesion, adhesion and water tension.Thus, the correct answer is option B.
The upward movement of water from the roots is called as the ascent of sap. MacDougal in 1936 put forward a hydrostatic system theory. According to this theory, the ascent of sap forms a continuous system through unthickened areas. Hence, blockage of few treachery elements does not break the continuity of water column. The water column is maintained by transpiration pull. Hence, the ascent of sap continues even when the continuity of water column is broken by overlapping cuts. According to him, the water column is maintained by cohesion, adhesion and water tension.
Thus, the correct answer is option B.
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