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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: - In bony vertebrates, the formation of bone is often preceded by the presence of a
- Which one of the following statements is not correct?
- Haversian canal is
- Every cell of the body contributes gemmules to the germ cells and so shares in the
- Gulcose is mainly absorbed in
Topics: Transport and Nutrition in Plants
(163)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In bony vertebrates, the formation of bone is often preceded by the presence of a
- Which one of the following statements is not correct?
- Haversian canal is
- Every cell of the body contributes gemmules to the germ cells and so shares in the
- Gulcose is mainly absorbed in
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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