Petiole modified for photosynthesis is

Options

A. Cladode
B. Phylloclade
C. Phyllode
D. Tuber.

Answer

To solve the question "Petiole modified for photosynthesis is," we will analyze the options provided and determine which one correctly identifies a modified petiole that performs photosynthesis.

### Step-by-Step Solution:

1. **Understand the Terms**:
- The term "petiole" refers to the stalk that attaches the leaf blade to the stem of the plant.
- The question is asking for a modification of the petiole that allows it to perform photosynthesis.

2. **Evaluate the Options**:
- **Cladode**: This is a modified stem that takes on the function of photosynthesis. Since it is a stem modification, it does not fit the criteria of being a modified petiole.
- **Phyloclad**: This term also refers to a modified stem that performs photosynthesis. Again, this does not relate to the petiole.
- **Phylode**: This is a modified petiole that has adapted to perform photosynthesis. This option fits the criteria given in the question.
- **Tuber**: This is a modified stem that typically grows underground and stores nutrients. It does not perform photosynthesis and is not related to the petiole.

3. **Identify the Correct Answer**:
- Based on the analysis, the only option that describes a modified petiole capable of photosynthesis is **Phylode**. Therefore, the correct answer is option C, Phylode.

4. **Example**:
- An example of a plant that has phylodes is the Australian acacia, where the petiole is modified to carry out photosynthesis.

### Final Answer:
The petiole modified for photosynthesis is **Phylode** (Option C).