Which of the following is not an advantage of GM crops?

Options

A. Increased crop tolerance to salt in soil
B. Increased reliance on chemical pesticides
C. Reduction in post harvest losses
D. Increased efficiency of mineral usage

Answer

To determine which option is not an advantage of GM crops, we can follow these steps:

### Step-by-Step Solution:

1. **Understand GM Crops**: GM crops, or genetically modified crops, are plants whose genetic material has been altered using genetic engineering techniques. This modification is done to enhance certain traits such as resistance to pests, diseases, or environmental conditions.

2. **Identify Common Advantages of GM Crops**:
- **Increased Resistance to Pests**: For example, Bt crops have been engineered to express a toxin from the bacterium Bacillus thuringiensis, making them resistant to certain pests.
- **Reduction in Chemical Pesticide Use**: Because GM crops can be engineered to resist pests, the need for chemical pesticides is reduced.
- **Improved Nutritional Content**: Some GM crops, like golden rice, have been modified to contain higher levels of essential nutrients, such as vitamin A.
- **Enhanced Shelf Life**: Certain GM crops have been modified to have a longer shelf life, reducing post-harvest losses.

3. **Evaluate the Options**: The question asks for the option that is not an advantage of GM crops. One of the options states that GM crops increase reliance on chemical pesticides. This is contrary to the established benefits of GM crops, which often reduce the need for chemical pesticides.

4. **Select the Correct Answer**: Based on the analysis, the option stating that GM crops increase reliance on chemical pesticides is not an advantage of GM crops. Therefore, this is the correct answer.

### Final Answer:
The option that is not an advantage of GM crops is the one stating that they increase reliance on chemical pesticides.

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