人教新课标版高二选修8 Unit2 Cloning-Reading and language points ppt教学教案.ppt

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1、Unit2CloneReadingPre-readingWhatisclone?Howiscloneproduced?Whatbenefitscanhumangainfromcloning?Whatproblemsmayarisewhenhumanbeingsarecloned?1.Whatisclone?Cloneisawayofmakinganexactcopyofanotheranimalandplant.2.Howiscloneproduced?Thishappensinplantswhengardenerstakecuttingsfro

2、mgrowingplantstomakenewones,andwhensmallpartsofaplantaretakenandgrowninalaboratory.Italsohappensinanimalswhentwinsidenticalinsexandappearanceareproducedfromthesameoriginalegg.3.Whatbenefitscanhumangainfromcloning?4.Whatproblemsmayarisewhenhumanbeingsarecloned?Itcanhelpcuredise

3、asesandcanhelpcoupleswhohavenobabytobearanewbaby.TheremaybemorebadpeoplelikeHitler.While-readingSkimandsumupthemainideaofeachparagraph.Para.1cloningisawayofmakinganexactcopyofanotheranimalorplant.Para.2cloninghavetwomajoruses.Para.3TheproblemsofDollyPara.4TheeffectofDollyPara.

4、5Itisforbiddentoclonehumanbeing.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsu

5、reaboutitsfuture.2.WhichofthefollowingstatementsaboutcloningisNOTtrueaccordingtotext?____Cloningissomethingthathasbeendevelopedquiterecently.Twinsthatlookexactlythesameareoriginallyfromthesameegg.Cloningisusedbygardenerstomakemoremoney.D.Animalcloningismuchmoredifficultthanpla

6、ntcloning.3.ThecloningofDollythesheepsucceededbecause____.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailed4.Thelambisthecloneofthecellfromsheepbecause

7、_____.A.itprovidestheeggcellB.itgivesbirthtothelambC.itprovidesthenucleusD.itisafemalesheep5.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.9D.12Post-readingFillinthechartProblems/dangersofcloningAdvantagesofcloningAnimalclonesmaydeveloptheillnessesofolder

8、animals.Medicalcloningcouldproducecuresforseriousdegenerative