1、Unit 9 Genetically Modified FoodWords to noteallergies 11; consultation 12; excessive 10; fertilizer 8; implanted 7; infrastructure 1; notably 4; potentially 3; reactions 6; relieve 2; resistance 5; stable 9Understanding the textPart A: True or false1. T2. F3. T4. F5. T6. F7. T8. F9. F10. T 2. Genet
2、ically modified food (GMF) is developed from specially modified seeds and animal embryos. In animal-to-vegetable modification fish genes have been introduced into tomato seeds to increase the productivity of the seeds.4. Genetically modified crops will not only feed the worlds population, but will a
3、lso help to save the Earths natural environment.6. A well-fed population would be a stable one therefore less likely to start wars.8. A very serious disadvantage of GM crops is that they are all very similar genetically and this means that they may have few defences against new forms of viruses and
4、funqi.9. In some countries GMF is banned while in others it must be clearly labeled so that people are aware of what they are buying.Part B: Interpreting the text1. d) To present a balanced argyment about GM and non-GM food.2. c) A magazine.3. Because the companies insist that farmers buy all their
5、seeds from the company to ensure that a crop is 100% GM. Poor farmers have to pay high prices for their seeds and in cases of failure, they will have no crops and no money.Developing your skills Part A: Recognising sequences: further practice Genes from different sources are spliced together.Treated
6、 seeds or embryos are grown.Results are recorded.GM crop is grown.Part B: Considering an argument: further practiceAdvantagesDisadvantagesGMF provides larger crops and can help to feed the worlds population.A well-fed world population will be stable and unlikely to start wars.GM crops are not only l
7、arger, they are also resistant to a range of diseases and to extremes of climate.GM crops do not have to be treated with chemicals such as fertilizers or pesticides and this will benefit the natural environment.GM crops allow farmers to maximize the productivity of their land.If no longer struggling
8、 to feed itself, a country can develop its industrial infrastructure.Existing GM crops (e. g. soybeans) appear not to have harmed the health of consumers.Dangerous products (e. g. tobacco) could be treated genetically to make them harmless.GMF is unnatural and may have negative effects in the future
9、.GMF may cause illness among humans.GMF may change the natural balance between plant and animal life.GMF has never been part of the human food supply and may make problems (e. g. allergies) worse.Treating GM crops to be resistant to viruses and fungi can kill beneficial insects such as bees.GM crops are similar genetically and may have little defence against new forms of viruses and fungi.Extending your vocabulary Part A: Collocationsa laughan experiencea triptakemakehavedoproblemamountmanlargegreatbigmajor
