collateral open vascular bundles and eustele are found in

Options

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

Answer

To solve the question regarding where collateral open vascular bundles and eustele are found, we can follow these steps:

### 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.

2. **Defining Collateral Open Vascular Bundles**:
- Collateral vascular bundles are those where xylem is located on the inner side and phloem on the outer side.
- "Open" refers to the presence of cambium between the xylem and phloem, allowing for secondary growth.

3. **Understanding Eustele**:
- Eustele is a type of vascular arrangement where vascular bundles are arranged in a ring, commonly found in dicotyledonous plants.

4. **Identifying Plant Types**:
- Dicotyledons (dicots) typically have two cotyledons and exhibit reticulate venation in their leaves.
- Monocotyledons (monocots) have one cotyledon and usually display parallel venation in their leaves.

5. **Analyzing the Options**:
- **Dicot Root**: Generally has a different arrangement of vascular bundles.
- **Dicot Stem**: Contains collateral open vascular bundles and eustele.
- **Monocot Stem**: Typically has scattered vascular bundles, not collateral.
- **Monocot Root**: Similar to monocot stems, it does not have collateral open vascular bundles.

6. **Conclusion**:
- The correct answer is **Dicot Stem**, as it contains collateral open vascular bundles and eustele.

### Final Answer:
**Collateral open vascular bundles and eustele are found in the Dicot Stem.**

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