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人教版高中英语选修八全册教案

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restinthetextandencourageSstopredictthecontentofthetext.Getstudentstodiscusswhatthepassagetalksaboutandhowtheyunderstandthemeaningofthetitle“Cloning:Whereisitleadingus?”AskSstotalkaboutthefollowingquestions.(1)Whatiscloning?(2)Howisacloneproduced?(3)What’sthefunctionofcloning?(4)What’stheeffectofthecloning?SuggestedAnswers:icallyidenticalandhavebeenproducedasexuallyfromthesameoriginalcell.Theyincludenaturalandman-madecloneshecloningofplantsissimpleandrelativelyeasy.Itcanbeedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalcloning).plicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.Itispossibletousecloningtocureseriousillnesses,andhelpinfertilepeoplehavebabies.hemselvessotheycanliveforever.Peoplemaywanttoclonedeadchildren.heirfavoritepets.

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