英语 Unit 3 Science and nature Welcome to the unit课件 牛津版必修5 课件VIP专享VIP免费

Unit3ScienceandnatureWelcometotheunitTogetageneralideaofwhatwearegoingtolearninthisunitToknowsomethingaboutcloneTolearntodiscussaboutcloneorclonedanimals•Doyouthinkthefastdevelopmentofscienceandtechnologyhasbeengoodfornature?Whyorwhynot?•Howshouldscienceandnaturerelatetoeachother?•Doyouthinkthathumanbeingsshouldtrytocontrolnature?Shouldwedoanythingagainstthelawsofnature?Doyouknowsomethingaboutcloning(克隆)?Manhascreatedmanythingsandnowtheyareevenreadytorecreatethemselves.“Cloning”isanewbiotechnology(生物技术)whichaimstoproduceanexactcopyofananimaloraplantfromitsowncells,DNAfragments(片段)ororganisms(有机体)inanasexual(无性繁殖的)way.ClonedanimalsWhatdoyouseefromthisvideo?DollyanditscreatorWhatdoyouknowaboutDolly?•theworld’sfirstclonedmammal•createdbyScottishscientistsin1996•diedin2003becauseoflungdisease•manycountrieshavebannedhumancloningsinceDolly’sbirthLookatthefollowingpicturesandstudythem.Canyoutellwhatisthemainfeatureofcloning?Canyouidentifythedifferencesbetweentheclonedanimalsandnormalones?Dollyistogetherwithhermother.WhatdoyouknowaboutDolly?•theworld’sfirstclonedmammal•createdbyScottishscientistsin1996•sparkedworldwideinterestandconcernafteritsbirth•manycountries,includingGermany,France,Canada,Switzerland,Austria,NorwayandSouthAmerica,havebannedhumancloningsinceDolly’sbirth•diedin2003becauseoflungdiseaseThekitteninthepictureiscalledCC.Itsnameisfrom“Copycat”.ItwasborninDecember2002.TheresearchersinTexasproducedCCwithacelltakenfromhermotherRainbow.CCwasahealthykittenwhogrewintoalivelyaffectionatehousecat.Sheisnottheexactcopyofherclone-motherbecausetheygrewupindifferentsurroundings,thoughthesharedthesamegenes.Thesefemalepigsarealsocloned.TheywerebornonChristmasDay2001.TheywereNoel,Angel,Star,JoyandMary.Althoughtheyarenotthefirstclonedpigs,theyareactuallythefirsttobeengineeredinawaythattheirorgansmoresuitablefortransplantationintohumans.Duetotheshortageofhumanorgansfortransplants,manypeoplearedyingbecausesomeoftheirorgansdonotwork.Itishopedthattheorgansfromthesepigswillbeusedinhuman’sbodies.ThenameofthefirstclonedmonkeyisANDi.Itisfrom“insertedDNA”speltbackwards.Theplayfulcoffee-colouredmonkeywasbornin2000.ThetechnologyisdifferentfromthatusedforDolly.ResearchersinOregon,theUSAcreatedthisfirstgeneticallymodifiedmonkeybyputtingageneformajellyfish,anotherspecies,intosix-day-oldmonkeyembryos(胚胎).Fromtheappearance,theclonedanimalsareexactlythesameastheoriginalones.However,someclonedanimalswerereportedtohavehealthproblemsanddiedusuallyyoung.Thepairofcalveswerebornon5July1998inIshikawa,Japan.TheyweretwoyearsyoungerthanDolly,beingsecondadultanimalclonesintheworld.MoreexamplesaboutclonedanimalsThemuleinthepictureistheworld’sfirstclonedmule.Itwasbornon4May2003.HisnameisIdahoGem.In1962,thescientistGurdonfromCambridgeclonedatadpoleIn1963,ChinesescientistTongDizhouclonedacarp,whichwas33yearsearlierthanDolly.Bornin2005inSeoulUniversityinKoreaSnoopyWhatdoyouthinkofthenewkindoftechnology?Doesithaveanyadvantagesordisadvantages?Advantagesofcloning:•curemanygeneticdiseases•savepeople’slives•preventsomeendangeredanimalsfromdyingoutDisadvantagesofcloning:•causeethicalproblems•violate(违背)humanrights•violatethelawsofnature•…Doyouthinkitwouldbeagoodideatoclonehumanssomeday?Whyorwhynot?Itisagoodidea,for…reasons:1.Cloningcanhelpcuremanydiseasesandsavealotofpeople’slives.2.…3.…PartyAItisabadidea,for…reasons::1.Cloningcanleadtoethical(伦理)problems.2.…3.…PartyBIfpossible,doyouwantanotherpersontobeexactlythesameasyou?JustimagineJustimagineSupposingyouarefacingyoursecondselfwholookslikeyou,talkslikeyouandthinkslikeyou,howdoyoufeel?Oneman,oneworld?FunnypicturesFunnypicturesIfcloninggoesinawrongdirection,whatwillhappen?Adogoraneagle?Adogoraneagle?Aduckoracrocodile?Aduckoracrocodile?Acockoradog?Acockoradog?Alionorakangaroo?Alionorakangaroo?Afrogoracrocodile?Afrogoracrocodile?Atortoiseorabear?Atortoiseorabear?Abirdoradog?Abirdoradog?Adogoraman?Adogoraman?Whoisthis?克隆如何才能和谐？Thinkaboutwhatwe’vejustlearnttoday.Studywithoutreflectionisawasteoftime.AftertheclassIt’stimetostoptheclassforyoutolookbackinsilence.HomeworkWriteashortpassageaboutwhetheritisagoodideatoclonehumans.Todayourclasshadadiscussionaboutwhetheritisagoodideatoclonehumans.Somestudentsthinkthatitisgood,for…However,someotherstudentsthinkitisnotagoodidea,for…Inmyopinion,…