题目内容
The first genetically modified food approved for release was the Flavr Savr tomato in ______, which was developed by Calgene. It was engineered to have a longer shelf life by inserting an antisense gene that delayed ripening.
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With the creation of golden rice in _______, scientists had genetically modified food to increase its nutrient value for the first time.
_________wasthefirstcountrytocommercializeatransgeniccropin1993withtheintroductionofvirus-resistanttobacco.
In1995,Bacillusthuringiensis(Bt)Potatowasapprovedforcultivation,makingitthefirstpesticideproducingcroptobeapprovedin_________.
By 2010, ____ countries had planted commercialized biotech crops and a further 31 countries had granted regulatory approval for transgenic crops to be imported.
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