Petiole becomes tendrillar to help in climbing in

Options

A. Smilax
B. Tropaeolum (Garden Nasturtium)
C. Both (1) and (2)
D. Gloriosa

Answer

To answer the question "Petiole becomes tendrillar to help in climbing in," we need to identify the plants where the petiole is modified into tendrils, which assist in climbing.

### Step-by-Step Solution:

1. **Understanding Petiole**: The petiole is the stalk that attaches the leaf to the main stem of the plant. It plays a crucial role in supporting the leaf and facilitating its movement.

2. **Modification of Petiole**: In certain climbing plants, the petiole undergoes a modification to become tendrils. Tendrils are specialized structures that help plants climb by wrapping around supports.

3. **Characteristics of Tendrils**: Tendrils are coiled, thread-like structures that often have sensitive tips. These tips can sense contact with other objects, allowing the tendril to coil around them for support.

4. **Examples of Plants**:
- **Smilax**: In Smilax, the stipules (leaf appendages) are modified into tendrils.
- **Gloriosa**: In Gloriosa, the leaf apex is modified into tendrils.
- **Garden Nasturtium (Tropaeolum)**: In this plant, the petiole itself is modified into tendrils, allowing it to climb effectively.

5. **Conclusion**: The correct answer to the question is that the petiole becomes tendrillar to help in climbing in **Garden Nasturtium (Tropaeolum)**.

### Final Answer:
The petiole becomes tendrillar to help in climbing in **Garden Nasturtium (Tropaeolum)**.

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