The petioles that are green and synthesise food is observed in

Options

A. Asparagus
B. Euphorbia
C. Australian Acacia
D. Opuntia

Answer

To solve the question regarding which plant has green petioles that synthesize food, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Petiole**: The petiole is the stalk that connects the leaf blade (lamina) to the stem. It plays a crucial role in supporting the leaf and facilitating the transport of nutrients and water.

**Hint**: Remember that the petiole is not the leaf itself but connects the leaf to the stem.

2. **Identifying Modifications**: In some plants, the petiole can undergo modifications. One such modification is called a phyllode. A phyllode is a flattened, leaf-like structure that arises from the petiole and is capable of photosynthesis.

**Hint**: Look for terms like "phyllode" when thinking about petiole modifications.

3. **Photosynthetic Capability**: The question specifies that the petioles are green and synthesize food. This indicates that the structure in question must contain chlorophyll and perform photosynthesis.

**Hint**: Green structures in plants typically contain chlorophyll, which is essential for photosynthesis.

4. **Identifying the Plant**: The transcript mentions that phyllodes are found in Australian Acacia. This plant has petioles that are modified into phyllodes, allowing them to synthesize food.

**Hint**: Consider the geographical location and specific plant types when identifying plants with unique modifications.

5. **Excluding Other Options**: The transcript also discusses other plants like asparagus and Euphorbia. Asparagus has a stem modification called cladode, while Euphorbia has phylloclades (another stem modification). These do not relate to the petiole modification described in the question.

**Hint**: Pay attention to the type of modification (leaf vs. stem) when evaluating different plant options.

6. **Conclusion**: Based on the information provided, the correct answer is that the green petioles that synthesize food are observed in **Australian Acacia**.

### Final Answer:
The petioles that are green and synthesize food are observed in **Australian Acacia**.