HORTICULTURE

Detailed explanation-1: -Bt cotton is genetically modified cotton which is insect resistant. The butterflies feeding on Bt cotton die due to the Bt toxin in the modified plant.

Detailed explanation-2: -Bt cotton is resistant to pest, such as lepidopteran, dipterans and coleopterans.

Detailed explanation-3: -1. All Bt cotton plants contain one or more foreign genes derived from the soil-dwelling bacterium, Bacillus thuringiensis; thus, they are transgenic plants. The insertion of the genes from B. thuringiensis causes cotton plant cells to produce crystal insecticidal proteins, often referred to as Cry-proteins.

Detailed explanation-4: -Bt cotton is genetically engineered to produce a toxin which kills insect pests which eat the plant and cause damage. Bees and butterflies only forage for nectar in flowers and do not eat any part of the plant. So, they do not die.