Identifying disadvantages of genetic engineering in plants

Steps:

• Review the question: Identify which option does not represent an advantage of genetic engineering.
• Examine choices: A describes a potential risk, while B, C, D list benefits like predictability, nutrition, and reduced chemical use.
• Recall genetic engineering basics: It allows targeted gene insertion for desired traits but can lead to unintended ecological effects.
• Select A: It highlights a drawback, not an advantage.

Why A is correct:

• Gene flow from GM crops to wild plants risks creating "superweeds" resistant to herbicides, a known ecological concern per biodiversity laws like the Convention on Biological Diversity.

Why the others are wrong:

• B: Genetic engineering uses precise techniques like CRISPR for reliable, predictable trait expression.
• C: It enables enhancements, such as Golden Rice with added vitamin A for better nutrition.
• D: Pest-resistant genes, like Bt toxin, decrease reliance on chemical pesticides and fungicides.

Final answer: A