In Passiflora, a weak stemmed plant, the tendrils are modification of :

Options

A. stipules
B. leaves
C. axillary buds
D. terminal leaflets

Explanation

**Step-by-Step Solution:**

1. **Understanding Tendrils**:
- Tendrils are specialized structures that are typically thin, coiled, and sensitive. They are primarily used by plants to support themselves by climbing on nearby structures or other plants.

2. **Identifying the Plant**:
- The question specifically refers to the plant Passiflora, which is known for its weak stem and climbing habit.

3. **Analyzing the Options**:
- The options provided are stipules, leaves, axillary buds, and terminal leaflets. We need to determine which of these is modified into tendrils in Passiflora.

4. **Examining Each Option**:
- **Stipules**: These are small leaf-like structures found at the base of the leaf stalk. In some plants like Smilax, tendrils can be modifications of stipules, but this is not the case for Passiflora.
- **Leaves**: In some plants, such as Pisum sativum (garden pea), tendrils can be modified leaves. However, this does not apply to Passiflora.
- **Axillary Buds**: These are embryonic shoots located in the axil of a leaf. In Passiflora, the tendrils are indeed modifications of axillary buds.
- **Terminal Leaflets**: In certain plants, tendrils can be modifications of terminal leaflets, but this is not applicable to Passiflora.

5. **Conclusion**:
- After analyzing all the options, we conclude that in Passiflora, the tendrils are modifications of axillary buds. Therefore, the correct answer is **axillary buds**.

**Final Answer**: In Passiflora, a weak-stemmed plant, the tendrils are modifications of **axillary buds**.

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