Some insects that are not killed by GM foods might find themselves made stronger. How so? The insecticides used to protect most of todays crops are sprayed on the crops when needed and decay quickly in the environment. But GM plants produce a continuous level of insecticide. Insect species feeding on those crops may develop resistance to the plants and could do so in a hurry, say the critics. Insects may also develop a resistance to the insecticide Bt.
At the forum on GM food held last year in Canada. GM crops that have been made resistant to the herbicide might crossbreed with wild plants, creating superweeds that could take over whole fields.
So where do you stand? Should GM food be banned in the United States, as they are in parts of Europe? Or do their benefits outweigh any of the risks they might carry?
1. Paragraphs 1,23 tries to give the idea that
A) GM foods may bring about great benefits to humans.
B) We cannot recognize the benefits of GM foods too early.
C) GM foods may have both benefits and harm.
D) GM foods are particularly good to the kwashiorkor patients.
2. Why is the case of the pollen-sprayed milkweed citied in Paragraph 6?
A) It is cited to show GM foods can kill insects effectively.
B) It is cited to show GM foods contain more protein.
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