Unit 3 Period One.docx
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1、Unit3ScienceandnatureCloningextinctandendangeredspecies什么是克隆?克隆技术如何在生活中应用才能更好地为人类服务?文堂通过一些实例给出了答案。Cloning,ormoreprecisely,thereconstructionoffunctionalDNAfromextinctspecieshas,fordecades,beenadream.Tliebestcurrentcloningtechniqueshaveanaveragesuccessrateof9.4percent.Severaltissuebankshavecomeintoexi
2、stence,includingtheFrozenZooattheSanDiegoZoo.tostorefrozentissuefromtheworldsrarestandmostendangeredspecies.In2019racownamedBessiegavebirthtoaclonedAsiangaur(亚洲白肢野牛),anendangeredspecies,butthecalfdiedaftertwodays.ln2019.abanteng(爪哇野牛)wassuccessfullyclonedfromathawedfrozenembryo.Tliesesuccessesprovid
3、edhopethatsimilartechniquesmightbeusedtocloneextinctspecies.InJanUary2009forthefirsttime,anextinctanimalthePyreneanibex(阿尔卑斯山的野山羊)wascloned,attheCentreofFoodTechnologyandResearchofAragon,usingthepreservedfrozencellnucleusoftheskinsamplesfrom2()19anddo11)esticgoaleggcells.Theibexdiedshortlyafterbirth
4、duetophysicaldefectsinitsIungs.RcscarchcrsarcalsoconsideringcloningendangeredspeciessuchasthegiantpandaandCheetah(猎豹).In2019,geneticistsattheAustralianMuseumannouncedthattheyhadrcplicalcd(M)DNAoftheIhylacine(袋狼),atthetimeextinctforabout65years,usingpolymerasechainreaciion(聚合fi链式反应).ScientistsattheUn
5、iVCniiIyofNewcastleandUniversityofNewSouthWalesannouncedinMarch2019thattheveryrecentlyextinctgastricb11xlingfrog(胃育蛙)wouldbethesubjectofacloningattempttoresurrect(登活)hespecies.词海拾贝eintoexistence成立2 .givcbirthto生产;生育3 .beusedto被用于4 .forthefirsttime首次:第一次5 .dueto由于:因为6 .suchas例如7 .atthetime在那时8 .attem
6、pttodosth企图做某事PeriodOneWelcometotheunit&ReadingI.单词自测.”.克隆:.克隆出来的动物或植物1.1 1.(生物的)组织;纸巾迎儿问题:争端:发行3 .rcaITifCaa直立的,现实生活中的Iik二Ij拴“吹逼真的,活灵活现的4 .cxactadj.确的,精确的exactly加精确I也,精确地5.iNeniion”意图,目的:企图intend”八准备,急欲6 .anxiey几忧虑,焦虑,担忧nitHs”少焦虑的7 .adop收养,领养:接受,接受adax也适应;改编8 .!fi!”办法律许可的,合法的legally此,所以I1.haNCSI”&式
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