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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.
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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
- Name the organisms which do not derive energy directly or indirectly from sun
- The presence of epiphytic roots is the characteristic feature of
- The term protoplasm for the cell contents was coined by
- Gametes are never hybrid. This is a statement of
- A dikaryon is formed when
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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