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1、限时规范练35Module5Cloning核心素养关键词:培养学生人与社会、克隆科技的素养能力意识一、阅读理解AThenewsthatresearchershaveusedcloningtomakehumanembryosforthepurposeofproducingstemcellsmayhavesomepeoplewonderingifitwouldeverbepossibletocloneaperson.Althoughitwouldbeimmoral,expertssayitislikelybiologic
2、allypossibletocloneahumanbeing.Sincethe1950swhenresearchersclonedafrog,scientistshavecloneddozensofanimalspecies,includingmice,cats,sheep,pigsandcows.Withmice,researchersareabletousethousandsofeggs,andconductmanyexperiments,toworkouttheseproblems.“It’sanumbersg
3、ame,”saidDr.RobertLanza,thechiefscientificofficeratabiotechcompany.“Butwithprimates(灵长类动物),eggsareveryprecious,anditisnoteasytogetthemtoconductexperiments.”Inaddition,researcherscan’tsimplyapplywhatthey’velearnedfromcloningmiceorcowstocloningpeople.Cloninganani
4、malrequiresthatresearchersremoveproteinsthatarenecessarytohelpcellsdivide.Inmice,thisisn’taproblem,becausetheembryothatiscreatedisabletomaketheseproteinsagain.Butprimatesaren’tabletodothis,andresearchersthinkitmaybeonereasonthatattemptstoclonemonkeyshavefailed.
5、What’smore,clonedanimalsoftenhavedifferentkindsofabnormalities.Theseabnormalitiesarecommonbecauseclonedembryoshavejustoneparentratherthan10two,whichmeansthataprocessknownas“imprinting(印记)”doesnotoccurproperlyinclonedembryos.“Problemswithimprintingcanresultinext
6、remelylargeembryos,whichleadstoproblemswithbloodflowforthebaby,”Lanzasaid.“Theextremelyhighrateofdeathandthedevelopmentalabnormalitiesfromcloningmakecloningpeopleimmoral.It’slikesendingyourbabyupinarocketknowingthere’sa50-50chancethatit’sgoingtoexplode.”1.Whatc
7、anwelearnfromParagraph1? A.Animalcloningisillegal.B.Humancloningispossible.C.Humanembryosmayhavenewfunctions.D.Animalembryoscanbeusedformedicine.2.HowdoestheauthordevelopParagraph2?A.Bymakingcomparisons.B.Byshowingprocesses.C.Byofferinganalyses.D
8、.Byusingstatistics.3.Howweretheexperimentsoncloningmonkeys?A.Theyhavesolvedtheproblemwithproteins.10B.Theyhavebeenappliedtohumancloning.C.Theyweresuccessful.D.Theywereintrou
