Which of the following is an application of genetic engineering in plants?

• A. Sheep produce a protein for blood clotting required by haemophiliacs
• B. Bacteria make insulin
• C. Weed-killer resistant crops
• D. Plant-based vaccines

Answer: (C)

Genetic engineering in plants is about giving crops new traits that make farming easier or more productive. The clearest example here is crops that are resistant to a weed-killer. By introducing a gene that protects the plant from the herbicide, farmers can spray fields to kill weeds without harming the crop, which can simplify weed control and boost yields.

The other options involve genetic engineering in organisms other than plants or represent more experimental plant applications. Producing a blood-clotting protein in sheep and making insulin in bacteria are examples from animals or microbes, not plants. Plant-based vaccines are a plant biotech possibility, but they’re not as established as herbicide-tolerant crops.