genetic-modified-food-转基因食物英语报告

初三（20）班邵尧GeneticallyModifiedFood(GMF)GMFgeneticallymodifiedfoodaplant,animal,ormicroorganismthatiscreatedbymeansthatovercomenaturalboundaries.Geneticengineeringinvolvescrossingspeciesthatcouldnotbreedinnature.Forexample,genesfromafishhavebeenplacedinstrawberriesandtomatoes.’mreadytotakeariskforscience.Iwillbeoneofthepeoplewhoeatgeneticallymodifiedrice.Ialsowanttocallupagroupofyoungvolunteerstoeatthisstrainofrice–whowilltakeariskforhuman’sdevelopment.GMF,can’tbedeniedorbelievedwithoutexperiments.WeshouldbecarefulaboutGMF;WeshouldrecognizeGMFinasciencewayandtreatdifferentGMfoodsindifferentways.•Agricultural(农业)value•medicinalvalue•Ecological(生态)value•edibleness食用价值•Economic(经济)valuegrowfasterthantheGMcrops→traditionallygrowncrops↙↘moreproductivealargeryield多产的产量GMcropscanbemaderesistanttopests害虫↓Savestheuseoftoxicchemicals有毒化肥↓Moreenvironmentfriendlybecausetheyrequirelessherbicidesandpesticides.杀虫剂•GMFOffersmorenutritional(营养）valueandbetterflavor.Eg.VitaminAEconomicvalueReduceextracosts,suchasbuyingchemicalsandpesticides(农药）.PotentialdangerofGMFToxicityproblemSomeresearchersbelievethatforartificialrefiningandaddedgenes,canbeachievedinsomepeoplewanttoachievetheeffectofatthesametime,alsoincreaseandaccumulatetheoriginaltracesofpoisoninthefood.毒性问题一些研究学者认为，对于基因的人工提炼和添加，可能在达到某些人们想达到的效果的同时，也增加和积聚了食物中原有的微量毒素。AllergyproblemForafoodallergysometimesfoodallergictoapreviouslytheydonotproduceallergic,suchas:thescientistsaddedageneofcorntothewalnut,wheat,andshellfishgene,proteinisaddedwithgene,so,beforeeatcorncanpeoplewhoareallergictothenuts,wheat,andshellfishfoodallergies.过敏反应问题对于一种食物过敏的人,有时还会对一种以前他们不过敏的食物产生过敏，比如：科学家将玉米的某一段基因加入到核桃、小麦和贝类动物的基因中，蛋白质也随基因加了进去，那么，以前吃玉米过敏的人就可能对这些核桃、小麦和贝类食品过敏。ResistancetoantibioticsWhenthescientistsaforeigngeneintotheplantorbacteria,thisgeneandothergenesconnectedtogether.Peopleafterusingtheimprovedfood,foodwillbeinthehumanbodyresistancegenestopathogenicbacteria,makehumanbodyresistance.对抗生素的抵抗作用当科学家把一个外来基因加入到植物或细菌中去，这个基因会与别的基因连接在一起。人们在服用了这种改良食物后，食物会在人体内将抗药性基因传给致病的细菌，使人体产生抗药性。PresentSituationandFutureDevelopment‘Huahuinumberone’and‘BtShanyou63’.我国最近为转基因抗虫水稻“华恢1号”和“Bt汕优63”发放了安全证书。ShelvesstackedwithGMfoodsBut…CaneverycommonpersontellwhichonesarenaturalandwhichareGMproducts?