Explain why xylem transport is unidirectional and phloem transport bi-directional.

Explanation

### Step-by-Step Solution:

1. **Understanding Xylem Transport**:
- Xylem is a type of vascular tissue in plants responsible for the transport of water and minerals.
- It primarily carries these substances from the roots to the rest of the plant.

2. **Unidirectional Nature of Xylem Transport**:
- The transport of water and minerals occurs in a single direction, which is upward.
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