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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
- An example of synovial joint is found between
- Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of:
- A man without any knowledge of Botany thinks that is a flower
- Brown heart disease in cauliflower is due to the deficiency of
- What will happen if the stretch receptors of the urinary bladder wall are totally removed?
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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