A simple experiment called is used to identify the tissues through which food is transported.

Options

A. layering
B. reverse osmosis
C. girdling
D. grafting

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a simple experiment that identifies the tissues responsible for food transport in plants.

2. **Identifying the Correct Experiment**: The correct answer is the "girdling experiment." This experiment specifically targets the phloem tissue, which is responsible for transporting food (sugars) in plants.

3. **Conducting the Girdling Experiment**:
- A ring of bark, which includes the phloem tissue, is carefully removed from the stem of a plant. This process is known as girdling.
- The xylem, which is located beneath the bark, remains intact and continues to function normally, allowing water and nutrients to reach the leaves.

4. **Observing the Results**:
- After the girdling, the plant is monitored for changes. It is observed that there is an accumulation of sugar just above the girdled area.
- This indicates that while water and nutrients can still reach the leaves through the xylem, the removal of the phloem prevents the transport of food down to other parts of the plant below the girdle.

5. **Conclusion**: The results of the girdling experiment demonstrate that the phloem is responsible for food transport, while the xylem is responsible for water transport.

6. **Elimination of Other Options**:
- **Layering**: This is a method of vegetative propagation, not related to food transport.
- **Reverse Osmosis**: This is a process related to water movement, not specifically about plant tissue transport.
- **Grafting**: This is another method of vegetative propagation, not relevant to the question.

**Final Answer**: The simple experiment used to identify the tissues through which food is transported is called the **girdling experiment**.

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