高三英语上册Unit 3课件4.ppt

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1、welcomeUnit3ScienceversusnatureWelcometotheunitLead-inScienceisdevelopingsofastthatsometimesitisbeyondourimagination.ManhascreatedmanythingssuchasRadios,TVsetsandsoon.Whatelsehasbeencreatedbyman?Couldyougiveussomeexamples?ExplanationClone:produceanexactcopyofananimaloraplantfromitsowncells

2、Dollytheworld'sfirstclonedadultanimal.ThescientistswhoclonedDollyaretostopexperimentsinvolvinggeneticallymodifyingpigsforhumanorgantransplantsbecauseofconcernsthatdeadlynewdiseasescouldbepassedontopeople.Picture-talkTheworld‘sfirstclonedmule(驴),wasbornonMay4.Heiscreatedfromacellofhisbrothe

3、r.kittenRainbowTheworld'sfirstclonedcat,kitten,namedCc.Itwascreatedusingacelltakenfromanadultcat,Rainbow.Theworld'sfirstclonedpigswereproducedfromanadultfemalepigusingadifferenttechniquefromtheonethatproducedDolly.FiveclonedpigsApairofnew-bornclonedcalvesTheyarethesecondadult-animalclonesr

4、esearchcentresaidthenewtechniquewouldbeusedtobreedbettercattlestrainswithhigher-qualitybeeforgreatermilkcapacity.Thefirstclonedmonkeyisanotherincrementalsteptowarddesigningandperfectingnewtreatmentsforhumangeneticdisorders.Fromthesepictures,canyouidentifythedifferencesbetweentheclonedanima

5、lsandnormalones?DiscussionsInyouropinion,whatmightbethedifferencesbetweentheseclonedanimalsandnormalones?Cantheseclonedanimalsleadanormallifeasnormalanimals?Forexample,doesthemuleinPicture2runasfastashisbrother?Doyouthinkitwouldbeagoodideatoclonehumanssomeday?Whyorwhynot?