The document discusses several major genetically modified crops including golden rice, GM soybeans, GM tomatoes, and GM corn. Golden rice has been engineered to produce beta-carotene which provides vitamin A. GM soybeans are mostly herbicide resistant and used for livestock feed. The first GM food available was the FlavrSavr tomato, which had longer shelf life. Bt corn produces its own pesticide while herbicide tolerant corn is resistant to weed killers.