What is an open type of vascular bundle ?

Explanation

### Step-by-Step Solution:

1. **Definition of Vascular Bundle**:
- A vascular bundle is a part of the transport system in vascular plants. It consists of specialized tissues responsible for the conduction of water, minerals, and nutrients.

2. **Components of Vascular Bundles**:
- Vascular bundles are primarily made up of two types of complex tissues: xylem and phloem.
- **Xylem**: Responsible for transporting water and minerals from the roots to other parts of the plant.
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