模块五第三单元 M5U3 project课件.ppt

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1、GMfood:hopeordanger?Let’sgetstartedfromthosepictures.Whatdoyouknowaboutgeneticallymodifiedfood?Thefirstgeneticallymodifiedplant:tobacco烟草IntheUSandCanada,however,over70percentofthefoodsingrocerystoresintheU.S.andCanadacontaingeneticallyengineeredingredients（原料）mostlyintheform

2、ofcornandsoyproducts.PredictingGMfoodhopedangerforagainstWhatarepeople’sdifferentattitudestowardsthestudyofgenetics?Whatarethetwowaysthatananimalandaplantcanbegeneticallymodified?Readandanswerthequestions.Manypeopleareexcited,whileothersarefrightened.Onewayistoinsertnewmateri

3、alintoaplant’sorananimal’sDNAtogiveitnewqualities.Theotherwayistotakematerialoutofaplant’sorananimal’sDNAtoremoveunwantedqualities.3.WhatistheoneaimofGMresearchtalkedaboutinthearticle?4.WhathasGMtechnologybeendonetoplants?Theaimistoproducefoodthatcanmakepeoplehealthier.Ithasb

4、eenusedtoproduceplantsthatarebetterabletodefendthemselvesagainstpestsanddisease.Itcanalsoproduceplantsthathavelargerharvests.ExamplesofGMfoodMaizeMaizegeneticallymodifiedtoproduce BtproteinBtproteinkillsthe cornborerinsectMaizeMaizegeneticallymodifiedtoproduce BtproteinBtp

5、roteinkillsthe cornborerinsectmaizeMaizegeneticallymodifiedtoBtproteinBtproteinkillsinsect5.WhataretheproblemsaboutGMfoodandGMplants?Twomainproblemsaretalkedaboutinthisarticle.Oneiswhetheritissafeordangeroustoeat,theotheriswhetheritissafeordangeroustotheenvironment.6.Whatism

6、anycountries’attitudetowardsGMFOOD?Whydotheyholdsuchattitude?TheyhavehesitatedtopermittheproductionofGMfood,becausetheyarenotsurewhetherGMfoodissafe.GMfoodinworldMostEuropeancounreiesAmericaCanadaArgentinaChinaandmanyothercountriesWidelyplantedforbidconfusedCanyoutranslatethe

7、followingintoChinese？1.Nowhereisthistruerthanwithgeneticallymodifiedfood？转基因食品就是最好的例子。2.Researchhasbeenlimitedtoincreasingproductionprofits,ratherthanmakingsurethatGMfoodsaresafe.目前的研究只限于增加生产利润，而不是确保转基因食品的安全。3.Withthisprogress,doorshavebeenopeneduptotechnologies（thatneverexis

8、tedbefore）.有了这种进步，通向基因领域技术的大门已经敞开了，这在以前是从来没有的事。LanguagePoints1.While