[1] Corn to which the naturally occurring bacterium Bacillus thuringiensis has been transferred. Bt corn thereby has crystal proteins that are lethal to corn borers and corn earworms. [2] Potatoes genetically modified for higher starch contents. [3] Potatoes and tomatoes to which the antifreeze genes of cold water fish have been transferred. Seedlings thereby have better responses, and show better survival rates, to cold temperatures. [3] Rice that has been genetically modified, to contain beta-carotene and more iron. [4] Soybeans that have been genetically modified so as not to be affected by Roundup. The weedkiller thereby needs to be applied once, not several times.