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Who proposed cohesion theory of water movement in plants?
Options
(a) J C Bose
(b) Priestly
(c) Dixon and Jolly
(d) TV Engelmann
Correct Answer:
Dixon and Jolly
Explanation:
Cohesion-tension theory was proposed by Henry Dixon and Jolly in 1894. It is greatly supported and elaborated by Dixon (1914, 1924). It is also called transpiration pull theory and is based on the following assumptions.
1. Cohesive and adhesive properties of water molecules.
2. Continuous water column from root hairs through the stem to tip of leaves.
3. Strong transpiration pulls exerted by all the transpiring leaves on the stem.
Related Questions: - Organisms which can grow and multiply at temperatures of 100 – 105ºC belong to
- Which of the following are not true cells in the blood?
- In kidney, glucose is reabsorbed mainly by
- Due to plasmolysis, the plant cell
- Which one of the following is not observed in biodiversity hotspots?
Topics: Transport and Nutrition in Plants
(163)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Organisms which can grow and multiply at temperatures of 100 – 105ºC belong to
- Which of the following are not true cells in the blood?
- In kidney, glucose is reabsorbed mainly by
- Due to plasmolysis, the plant cell
- Which one of the following is not observed in biodiversity hotspots?
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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