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The rupture and fractionation do not usually occur in the water column in vessel / tracheids during the ascent of sap because of
Options
(a) lignified thick walls
(b) cohension and adhesion
(c) weak gravitational pull
(d) transpiration pull
Correct Answer:
cohension and adhesion
Explanation:
The rupture and fractionation do not usually occur in the water column in vessel / tracheids during the ascent of sap because of cohension and tension. The water molecules have a great mutual attraction with each other or in other words we can say that they have tremendous cohesive power which is sometimes as much as 350 atmospheres. Thus, the transpiration pull develops a negative pressure in the uppermost xylem cells. It is transmitted from there into the xylem of stems, and from there into the xylem o
Related Questions: - The nature of cells occuring in medulla is
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Topics: Transport and Nutrition in Plants
(163)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The nature of cells occuring in medulla is
- Bone marrow is absent in
- Four phases of cell cycle are
- Which set includes pathogenic arthropods
- Assertion – bentham and hooker’s system of classification is
Topics: Transport and Nutrition in Plants (163)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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