Vacular bundles are surrounded on all sides by a sclerenchymatous sheath in

Options

A. dicot stem
B. dicot root
C. monocot stem
D. monocot root

Answer

To solve the question regarding which type of plant structure has vascular bundles surrounded on all sides by a sclerenchymatous sheath, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Vascular Bundles**: Vascular bundles are the part of the plant that contains xylem and phloem, which are responsible for the transport of water, nutrients, and food.

2. **Identify the Types of Plants**: The question provides options related to different types of plants: dicot stem, dicot root, monocot stem, and monocot root.

3. **Analyze the Structure of Monocots and Dicots**:
- **Monocot Stem**: In monocot stems, the vascular bundles are scattered throughout the stem and are surrounded by a sclerenchymatous sheath, which provides support and strength.
- **Dicot Stem**: In dicot stems, vascular bundles are arranged in a ring and are not completely surrounded by sclerenchyma.
- **Monocot Root**: In monocot roots, vascular bundles are also present but not surrounded by a complete sclerenchymatous sheath.
- **Dicot Root**: In dicot roots, vascular bundles are arranged in a star shape and are not surrounded by sclerenchyma.

4. **Conclusion**: Based on the analysis, the vascular bundles in monocot stems are indeed surrounded on all sides by a sclerenchymatous sheath, which is why they are also referred to as fibrovascular bundles.

5. **Final Answer**: Therefore, the correct answer to the question is **Option C: Monocot Stem**.