CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY CRISTINA PEDRAZZINI / SCIENCE PHOTO LIBRARY
Genetic modification of a tomato, conceptual image. Genetic modification involves the alteration of an organism's genetic make-up. This is done to provide it with useful traits, such as frost resistance or a lengthened spoilage time. Some foods can also be enriched with vitamins, for instance to supplement a population's diet.
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