Tendrils of grapevine are

Options

A. Modified floral buds
B. Modified axillary buds
C. Modified terminal buds
D. Modified epiphyllous buds

Answer

To solve the question regarding the tendrils of grapevine, we need to analyze the options provided and understand the characteristics of tendrils in plants.

### Step-by-Step Solution:

1. **Understand the Structure**: Tendrils are specialized structures in climbing plants that help them attach to supports. They can be modified stems or leaves.

2. **Identify the Options**: The options given are:
- a) Modified floral bars
- b) Modified axillary bars
- c) Modified terminal bars
- d) Modified apical bars

3. **Analyze Each Option**:
- **Option a (Modified floral bars)**: Floral bars are related to flowers, and tendrils do not serve a floral function.
- **Option b (Modified axillary bars)**: Axillary buds are located in the leaf axil, but tendrils are not primarily derived from these buds.
- **Option c (Modified terminal bars)**: Terminal buds are located at the tip of the stem. In grapevines, the tendrils are indeed modified from these terminal buds to assist in climbing.
- **Option d (Modified apical bars)**: Apical refers to the topmost part of the plant, which is similar to terminal; however, the correct terminology in this context is "terminal."

4. **Conclusion**: Based on the analysis, the correct answer is **Option c: modified terminal bars**. This means that the tendrils of grapevine are modified structures that arise from the terminal buds of the plant.

### Final Answer:
Tendrils of grapevine are **modified terminal bars** (Option c).

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