The most commonly bioengineered food crop, about 95% of soybeans have been genetically modified in the laboratory, often, as with corn, to be Roundup ready, or able to withstand the herbicide glyphosate. This isn't just about tofu; many processed foods contain soy, perhaps most commonly as the emulsifier lecithin (one of the 10 most common ingredients in processed foods) but also in the form of soybean oil and soy sauce. Above, a farmer holds Monsanto's Roundup-ready soybean seeds at his family farm in Bunceton, Mo.
Dan Gill / Associated Press
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