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Water reaches the top of a plant due to
Options
(a) root pressure
(b) capillarity
(c) transpiration
(d) diffusion
Correct Answer:
transpiration
Explanation:
Water is mainly absorbed by roots which goes upwards so as to replace water loss in transpiration and to be used in photosynthesis. This upward movement of water from roots to leaves through stem against force of gravity is called ascent of sap. Different theories have been put forward in support of ascent of sap. They include root pressure theory, capillary theory and transpiration pull theory . Root pressure is developed when rate of absorption is more than rate of transpiration and so water is pushed
Related Questions: - The idea of two pigment systems in light reaction of photosynthesis was given
- Which of the following is not a characteristic feature of all chordates
- In cell cycle during which phase chromosomes are arranged in equatorial plate
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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
- The idea of two pigment systems in light reaction of photosynthesis was given
- Which of the following is not a characteristic feature of all chordates
- In cell cycle during which phase chromosomes are arranged in equatorial plate
- Yeast is used in the production of
- Crop rotation is used by farmers to
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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