A conjoint and open vascular bundle will be observed in the transverse section of

Options

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

Answer

To solve the question regarding the observation of a conjoint and open vascular bundle in the transverse section of a plant, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding the Terms:**
- **Conjoint Vascular Bundle:** This means that both xylem and phloem are located together at the same radius in the vascular bundle.
- **Open Vascular Bundle:** This indicates the presence of cambium between xylem and phloem, which allows for secondary growth.

2. **Analyzing Each Option:**
- **Option 1: Monocot Root**
- In monocot roots, the vascular bundles are typically scattered and do not exhibit a conjoint arrangement. Therefore, this option is incorrect.

- **Option 2: Monocot Stem**
- In monocot stems, the vascular bundles are conjoint but are closed, meaning there is no cambium present between xylem and phloem. Thus, this option is also incorrect.

- **Option 3: Dicot Root**
- In dicot roots, the vascular bundles are not conjoint; they are arranged in a different manner. Therefore, this option is incorrect as well.

- **Option 4: Dicot Stem**
- In dicot stems, the vascular bundles are both conjoint (xylem and phloem are present at the same radius) and open (cambium is present between xylem and phloem). This option meets both criteria.

3. **Conclusion:**
- The correct answer is **Option 4: Dicot Stem**, as it exhibits both conjoint and open vascular bundles.