A conjoint and open vascular bundle is observed in the transverse section of ……….

Explanation

**Step-by-Step Solution:**

1. **Understanding Vascular Bundles:**
- Vascular bundles are structures in plants that contain xylem and phloem, which are responsible for the transport of water, nutrients, and food throughout the plant.

2. **Definition of Conjoint Vascular Bundles:**
- Conjoint vascular bundles are those where both xylem and phloem are present together in the same bundle. This means that they are not separated but are found adjacent to each other.

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