Fleshy photosynthetic structures of Euphorbia are

Options

A. Moldified petioles
B. Modified secondary rachii
C. Modified roots
D. Modified stems

Answer

**Step-by-Step Solution:**

1. **Understanding Euphorbia**: Euphorbia is a diverse genus of flowering plants, commonly known as spurge. It includes a wide range of species that can vary from small annuals to large trees.

2. **Identifying the Structure**: The question asks about the fleshy photosynthetic structures of Euphorbia. In many Euphorbia species, particularly those found in arid regions, the stems undergo modifications.

3. **Modification of Stems**: In Euphorbia, the stems are modified into flattened or fleshy cylindrical structures. This adaptation allows the plant to store water, which is essential for survival in dry environments.

4. **Analyzing the Options**: The options provided in the question are:
- Modified Petioles
- Modified Secondary Stems
- Modified Roots
- Modified Stems

5. **Determining the Correct Answer**:
- Modified Petioles are known as phyllodes, but they are not the primary structures in Euphorbia.
- Modified Secondary Stems are not relevant to the question.
- Modified Roots serve different functions and are not the fleshy structures in question.
- Therefore, the correct answer is **Modified Stems**, as these are the fleshy structures that perform photosynthesis and water storage in Euphorbia.

**Final Answer**: The fleshy photosynthetic structures of Euphorbia are **Modified Stems**.

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