A high concentration of synthetic auxins is generally used for .

Options

A. Regulating the growth of roots
B. Weed control
C. Controlling cell enlargement
D. Preventing the growth of lateral shoots

Answer

**Step-by-Step Solution:**

1. **Understanding Synthetic Auxins**: Synthetic auxins are plant hormones that regulate various aspects of plant growth and development. They are often used in agriculture and horticulture for their growth-promoting effects.

2. **Identifying the Purpose of High Concentration**: The question asks about the specific use of high concentrations of synthetic auxins. The options provided are:
- Regulating the growth of roots
- Weed control
- Controlling cell enlargement
- Preventing the growth of lateral shoots

3. **Analyzing Each Option**:
- **Regulating the growth of roots**: Auxins do promote root growth, but this is typically done at lower concentrations.
- **Weed control**: High concentrations of synthetic auxins are known to be toxic to certain plants, particularly dicots. This property is exploited in herbicides to control weeds.
- **Controlling cell enlargement**: Auxins can influence cell enlargement, but this effect is not specifically associated with high concentrations.
- **Preventing the growth of lateral shoots**: While auxins can inhibit lateral shoot growth, this is not the primary use of high concentrations.

4. **Conclusion**: Based on the analysis, the correct answer is that a high concentration of synthetic auxins is generally used for **weed control**. This is because they can induce excessive ethylene production, which inhibits growth and can lead to the death of unwanted plants.

**Final Answer**: A high concentration of synthetic auxins is generally used for **weed control**.

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