Double osmometer and capillary tube experiment help in understanding

Options

A. Ascent of sap due to root pressure
B. Transport of food through phloem
C. Transport of water through xylem
D. All the above

Answer

### Step-by-Step Text Solution:

1. **Understanding the Double Osmometer and Capillary Tube Experiment**:
- The double osmometer and capillary tube experiment is designed to demonstrate the principles of osmosis and the movement of substances in plants. It provides insights into how water and nutrients are transported within plant tissues.

2. **Role of the Experiment in Plant Transport**:
- This experiment helps in understanding the transport mechanisms in plants, particularly focusing on the movement of food and water. It illustrates how substances move through the plant vascular system.

3. **Ascent of Sap and Root Pressure**:
- While the ascent of sap due to root pressure is an important concept in plant physiology, the double osmometer and capillary tube experiment primarily focuses on the transport of food through the phloem rather than the ascent of sap.

4. **Transport of Food through Phloem**:
- The phloem is responsible for the transport of organic nutrients, particularly sugars produced during photosynthesis. The experiment highlights how food materials are moved from source (where they are produced) to sink (where they are utilized or stored).

5. **Transport of Water through Xylem**:
- Although the xylem is responsible for water transport, the double osmometer and capillary tube experiment does not specifically address this aspect. Therefore, it is not the main focus of this experiment.

6. **Conclusion**:
- The primary understanding gained from the double osmometer and capillary tube experiment is the transport of food through the phloem. Thus, the correct answer to the question is that the experiment helps in understanding the transport of food through phloem.

### Final Answer:
The double osmometer and capillary tube experiment helps in understanding the transport of food through phloem.

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