Statement : While observing transverse sections of two stems, the anatomical characters were recorded as given below.Now tell which one is related to dicot stem

Options

A. Vascular bundles conjoint with fibrous bundle sheath.
B. Vascular bundles are not conjoint and without fibrous bundle sheath.
C. Vascular bundles collateral and closed.
D. Vascular bundles collateral and open.

Answer

To determine which anatomical characters are related to a dicot stem, we need to analyze the given options based on our understanding of vascular bundles in dicots and monocots.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- Vascular bundles consist of xylem and phloem.
- They can be classified based on their arrangement and presence of cambium.

2. **Types of Vascular Bundles**:
- **Conjoined Vascular Bundles**: Xylem and phloem are located on the same radius.
- **Collateral Vascular Bundles**: Xylem is located inside and phloem is outside.
- **Open Vascular Bundles**: Presence of cambium between xylem and phloem, allowing for secondary growth (characteristic of dicots).
- **Closed Vascular Bundles**: Absence of cambium, typical in monocots.

3. **Analyzing the Options**:
- **Option 1**: Vascular bundles conjoined with fibrous bundle sheath - This is more characteristic of monocots.
- **Option 2**: Vascular bundles not conjoined and without fibrous bundle sheath - This does not specifically indicate dicots or monocots.
- **Option 3**: Vascular bundles collateral and closed - This is characteristic of monocots.
- **Option 4**: Vascular bundles collateral and open - This is characteristic of dicots due to the presence of cambium.

4. **Conclusion**:
- The anatomical character that is related to dicot stems is **Option 4: Vascular bundles collateral and open**.