In rooted plants , transport in __________ essentially unidirectional from roots to stem .

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about the type of transport in rooted plants that is unidirectional, specifically from the roots to the stem.

2. **Identifying the Transport Tissues**: In plants, the transport of substances is primarily carried out by two types of vascular tissues: xylem and phloem.

3. **Role of Xylem**: The xylem is responsible for the transport of water and minerals. It plays a crucial role in moving these substances from the roots, where they are absorbed, to the upper parts of the plant, including the stem.

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