When a Farmer Grows Cotton Containing the Gene for Bt

question 67

Multiple Choice

When a farmer grows cotton containing the gene for Bt toxin,they often leave a strip of non-Bt cotton around the outside of the field (Figure 10.27) for what reason?

• A)To allow some rr bollworm caterpillars to survive
• B)Because the non-Bt cotton grows better
• C)To allow some RR bollworm caterpillars to survive
• D)Because the non-Bt cotton does not drive the moths and caterpillars to extinction
• E)To allow the non-Bt and Bt cotton plants to cross pollinate

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