Mass flow deals with translocation of :

Options

A. Water
B. Inorganic solutes
C. Sugars
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Mass Flow:** Mass flow refers to the movement of substances in plants, particularly the translocation of nutrients and organic solutes. It is a crucial process for the distribution of food materials within the plant.

2. **Identifying the Process:** The mass flow process is primarily explained by the Munch mass flow hypothesis. This hypothesis describes how food materials, specifically organic solutes, are transported from one part of the plant to another.

3. **Role of Phloem:** In plants, translocation occurs through the phloem, which is responsible for transporting food materials (mainly sugars) from the source (where they are produced, such as leaves) to the sink (where they are utilized, such as roots or fruits).

4. **Analyzing the Options:**
- **Water:** This is not transported by phloem; instead, it is primarily transported by xylem.
- **Inorganic Solutes:** Similar to water, inorganic solutes are also transported by xylem and not by phloem.
- **Sugar:** This is an organic solute and is indeed transported by phloem as part of the mass flow process.

5. **Conclusion:** Based on the Munch mass flow hypothesis and the role of phloem, the correct answer to the question is that mass flow deals with the translocation of sugar.

**Final Answer:** Mass flow deals with the translocation of sugar.

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