In young roots, water enters directly into the xylem vessels and/or tracheids. These are are parts of the

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the pathway through which water enters the xylem vessels and tracheids in young roots.

2. **Identifying the Components**: In young roots, the xylem vessels and tracheids are crucial for water transport. These structures are part of the plant's vascular system.

3. **Defining Apoplast**: The term "apoplast" refers to the pathway through which water moves in plants. It includes the non-living parts of the plant, such as cell walls and intercellular spaces.

...