Genetic engineering sometimes entails plant or animal genes' getting spliced into other species' DNA, either to improve crop yields or for warding off insects or disease.
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Aplant or animal genes' getting spliced into other species' DNA, either to improve crop yields or for warding off
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Bplant or animal genes that get spliced into the DNA of other species, either for improving crop yields or the warding off of
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Cthe splicing of plant or animal genes into other species' DNA, to either improve crop yields or to ward off
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Dsplicing plant or animal genes into the DNA of other species, either to improve crop yields or to ward off
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Esplicing of plant or animal genes into the DNA of other species, for either the improvement of crop yields or to ward off
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正确答案: D