The direction of the transport of auxins is

Options

A. Polar in basipetal
B. Polar in acropetal
C. Through xylem
D. Through phloem

Answer

### Step-by-Step Solution:

1. **Understanding Auxins**: Auxins are a type of phytohormone that play a crucial role in the growth and development of plants. They are involved in processes such as cell elongation and apical dominance.

2. **Chemical Composition**: The most common auxin is Indole-3-acetic acid (IAA), which is synthesized from the amino acid tryptophan.

3. **Transport Mechanism**: Auxins are known to be transported in a specific direction within the plant. This transport is referred to as "polar transport."

4. **Direction of Transport**: The polar transport of auxins occurs in a basipetal direction, meaning that it moves from the shoot (the upper part of the plant) towards the root (the lower part of the plant).

5. **Conclusion**: Therefore, the direction of auxin transport is from the shoot to the root tip, indicating a downward movement.

### Final Answer:
The direction of the transport of auxins is polar and basipetal, moving from the shoot to the root tip.

---