Auxin originates aat the tip of the stem and controls growth elsewheree .The movement of auxin is largely

Options

A. Acropetal
B. Basipetal
C. Lateral
D. Centripetal

Answer

**Step-by-Step Solution:**

1. **Understanding Auxin**: Auxin is a key plant hormone that plays a significant role in regulating various growth processes in plants, including flowering and phototropism.

2. **Location of Auxin Production**: Auxin is primarily produced at the tips of the stems and roots. This is where the growth of the plant is most active.

3. **Movement of Auxin**: The movement of auxin within the plant is crucial for its growth and development. It is important to understand the direction in which auxin moves.

4. **Types of Movement**:
- **Acropetal Movement**: This refers to the movement of auxin from the base of the plant towards the apex (tip). This is typically observed in roots.
- **Basipetal Movement**: This is the movement of auxin from the apex (tip) downwards towards the base of the plant. This is the primary movement observed in stems.
- **Lateral Movement**: This refers to movement across the plant, which is not the main focus for auxin.
- **Centripetal Movement**: This is the movement towards the center, which is also not applicable in the context of auxin movement.

5. **Conclusion**: Given that auxin originates at the tip of the stem and controls growth elsewhere, the correct description of its movement in stems is **basipetal**. Therefore, the answer to the question is **basipetal**.

**Final Answer**: The movement of auxin is largely **basipetal**.

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