Protoxylem lacuna are present in the vascular bundles of

Options

A. 1)Monocot stem
B. 2)Monocot root
C. 3)Dicot stem
D. 4)Dicot root

Answer

**Step-by-Step Solution:**

1. **Understanding Protoxylem Lacuna**: Protoxylem lacuna refers to the spaces or cavities that are found within the protoxylem tissue of vascular bundles. These lacunae are typically surrounded by parenchyma cells.

2. **Identifying Vascular Bundles**: Vascular bundles are the arrangements of xylem and phloem in plants. They can be found in various plant structures, including stems and roots, and can be classified into monocots and dicots.

3. **Analyzing the Options**:
- **Monocot Stem**: In monocot stems, the vascular bundles are scattered, and protoxylem lacunae are present.
- **Monocot Root**: Monocot roots do not typically have protoxylem lacunae.
- **Dicot Stem**: Dicot stems usually have a different arrangement of vascular bundles and do not contain protoxylem lacunae.
- **Dicot Root**: Similar to dicot stems, dicot roots do not have protoxylem lacunae.

4. **Conclusion**: Based on the analysis, the correct answer is that protoxylem lacunae are present in the vascular bundles of the monocot stem.

**Final Answer**: Protoxylem lacunae are present in the vascular bundles of the **monocot stem**.

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