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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
- Which of the following is polymerized to form proteins
- The presence of feathers and power of flight are the characteristic features of
- Natality is balanced by mortality. There will be
- Choose the wrong statement about excretion
- Due to less amount of iodine in water, metamorphosis of frog tadpole 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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