Explain with the help of one example of how genetically modified plants can:
(a) Reduce the usage of chemical pesticides
(b) Enhance the nutritional value of food crops
(a) Bt cotton contains the gene, which has a pesticidal role. This gene is pest-specific and affects only certain pests. By encountering most of the common pests of cotton, Bt cotton minimizes the use of chemical pesticides.
(b) Biofortification involves the addition of nutrients through genetic engineering. This can also be achieved through conventional breeding methods. Biofortification is beneficial because a plant product has inbuilt extra nutrient in it. This means that nutrients need not be added at the processing stage. This can help in tackling hidden hunger among the poor. Golden rice is an example of rice, which has been fortified with vitamin A.