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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
- Aerobic respiratory pathway is appropriately termed:
- In the ear of man, the perilymph passes from middle to inner ear through
- Which of the following components of blood does not enter into the nephron?
- The pathogen Microsporum responsible for ringworm disease in humans belong
- At metaphase, chromosomes are attached to the spindle fibres by their:
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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