Petiole is modified into tendril in

Options

A. phylloclade
B. cladode
C. Cladophyll
D. phyllode

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about a specific modification of the petiole in certain plants, where the petiole transforms into a tendril.

2. **Identifying the Plant**: In the provided transcript, the Australian acacia is mentioned. It is important to note that in this plant, the leaves are small and short-lived.

3. **Modification of Petiole**: The transcript explains that in some plants, the petiole can modify to form structures that perform photosynthesis. In the case of the Australian acacia, the petiole does not become a tendril but instead forms a flat green structure known as phyllodes.

4. **Clarifying the Terminology**: Phyllodes are flattened petioles that take on the role of leaves, especially in plants where true leaves are reduced or absent. This is different from tendrils, which are specialized structures that help in climbing.

5. **Conclusion**: Based on the information provided, the petiole is modified into phyllodes in the Australian acacia, not into tendrils. Therefore, the answer to the question is that the petiole is not modified into tendril in this case.

### Final Answer:
The petiole is modified into phyllodes in the Australian acacia, not into tendrils.

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