The chief sinks for the mineral elements in plants are

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the chief sinks for mineral elements in plants. A "sink" in plant biology refers to areas where substances, such as nutrients and minerals, are utilized or stored.

2. **Identifying Growth Regions**: The primary areas where plants actively grow are known as meristems. These include the apical meristem (found at the tips of roots and shoots) and lateral meristem (which contributes to the thickness of stems and roots).

3. **Role of Meristems**: Meristems are responsible for the division and growth of plant cells. As they divide and grow, they require a significant amount of minerals for various physiological processes, including cell division, elongation, and differentiation.

4. **Specific Types of Meristems**:
- **Apical Meristem**: Located at the tips of roots and shoots, it is responsible for the vertical growth of the plant.
- **Lateral Meristem**: Involved in the growth of branches, stems, and the development of flowers, fruits, and seeds.

5. **Conclusion**: The chief sinks for mineral elements in plants are primarily the apical and lateral meristems, as these regions require a substantial amount of minerals for growth and development.

**Final Answer**: The chief sinks for the mineral elements in plants are the apical and lateral meristems.

---