In which structure peripheral vascular bundles are generally smaller than centrally located ones ?

Options

A. Dicot stem
B. Monocot stem
C. Dicot root
D. Monocot root

Answer

**Step-by-Step Solution:**

1. **Understanding 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 throughout the plant.

2. **Identifying Peripheral vs. Central Vascular Bundles**: In the context of plant anatomy, vascular bundles can be categorized as peripheral (located towards the outer part of the stem) and central (located towards the center of the stem).

3. **Size Comparison**: The question specifically asks about the size of peripheral vascular bundles compared to centrally located ones. It is noted that peripheral vascular bundles are generally smaller than the centrally located ones.

4. **Reason for Size Difference**: The reason for this size difference is that the peripheral vascular bundles lack phloem parenchyma, which is a type of tissue that can contribute to the size and function of vascular bundles. Instead, these bundles may contain water-containing cavities.

5. **Occurrence in Plant Types**: This characteristic of smaller peripheral vascular bundles compared to central ones is observed in both monocots (monocotyledons) and dicots (dicotyledons).

6. **Conclusion**: Therefore, the correct answer to the question is that this phenomenon occurs in both dicot stems and monocot stems.

**Final Answer**: Both dicot stem and monocot stem.

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