Giruding experiment is not possible in maize and sugarcane because of

Options

A. Scattered vascular bundles
B. Open vasular bundles
C. Closed vasular bundles
D. Both 1 and 3

Answer

### Step-by-Step Solution

1. **Understanding the Girdling Experiment**:
- The girdling experiment involves removing all the tissues outside the vascular cambium, which includes the bark, cortex, and phloem, leaving only the xylem intact. This process is used to study the transport of nutrients and the effects of phloem removal on plant health.

2. **Observations from the Girdling Experiment**:
- After performing the girdling experiment, a swelling is observed above the girdled area. This swelling occurs because the phloem, which is responsible for transporting food throughout the plant, has been removed. As a result, food accumulates in that area, leading to the swelling.

3. **Consequences of Girdling**:
- The removal of phloem leads to a lack of food supply to the roots, causing them to die first. As the roots die, the upper parts of the plant that depend on the roots for nutrients also begin to die.

4. **Applicability to Plant Types**:
- The girdling experiment is primarily applicable to dicot plants. In dicots, the vascular bundles are arranged in a ring, allowing for easier removal of the phloem.

5. **Why Girdling is Not Possible in Maize and Sugarcane**:
- Maize and sugarcane are monocot plants, which have scattered vascular bundles. This scattered arrangement makes it difficult to remove the phloem from each vascular bundle effectively, thus making the girdling experiment impractical in these plants.

6. **Conclusion**:
- The reason girdling is not possible in maize and sugarcane is due to the presence of **scattered vascular bundles**.

### Final Answer
The girdling experiment is not possible in maize and sugarcane because of **scattered vascular bundles**.

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