旧人教版高三英语全一册 Unit4 Green WorldVIP免费

Unit4GreenWorldTeachingaims:1.Goals:Talkaboutbotany;Speakaboutprocedure;ReviewtheObject;Writeadescriptionofplants2.Specialfocus:ImprovereadingskillsandEnlargevocabulary.a.DirectSstoreadthe3passagesonthetextbook;b.GuideSstolearntousethefollowingwordsandexpressions:Tulip,sunflower,peony,strawberry,lemon,hemp,cosy,accumulated,abandon,promote,astronomy,appetite,calculate,identification,passaway,species,category,privilegePeriod1ReadingThebirthofascience(onP30)Step1.WarmingupTask1.Speaking:Dotheoralpracticeonp29.Theprocedureofgrowingsoybeans.Step2.ReadingTask2.Scanthepassageforinformationandtrytoanswerthequestion:WhywasCarlLinnaeusimportanttothehistoryofbotanyasascience?Step3.Post-readingTask3:Answeringthequestionsonp31-32;Step4.HomeworkFinishalltheexercisesonWordStudyandGrammaronp32--34.Period2.IntegratingReadingSkillsWildlifeandGardenRoses(p34-35)Step1.Revision1.CheckhowfurthertheSsknowaboutbotany.Tulip,sunflower,peony,strawberry,lemon,hemp,potato,bean,cotton,radish,carrot,etc.2.Checkthehomework.Ifnecessary,givesomeexamplestoreviewtheObject.Exercise1-4onp164isspeciallydesignedtochecktheSsiftheyarefamiliarwiththeObject.Step2.Readthepassageandfinishtheexercisesattachedtothepassage.Step3.ExtensiveReading:TheNewEugenics:GeneticEngineeringbyJackA.Palmer,用心爱心专心authorofthebrilliantbookEvolutionaryPsychology,TheUltimateOriginsofHumanBehaviorThekeydifferencebetweennaturalselectionandselectivebreedingisthatselectivebreedingisalwaysbasedonvaluejudgments.Naturalselectioninisanautomaticprocessthatiswhollyindifferenttoconceptssuchasgoodandbad,beautifulandugly,strongandweak,nobleorloathsome.Naturalselectionrevolveswhollyaroundreproductiveviability.Althoughreproductiveviabilityisnecessaryinselectivebreeding,theselectionisorientedtowardincreasingsomecharacteristicorsetofcharacteristicsthathavebeenjudgedtobeofvalue.Eugenics,initsoriginalsense,likeotherformsofselectivebreedingwasconceptualizedasameansof"improving"thestock,inthiscasethehumanrace.Eugenicsisaveryoldidea,datingbacktoPlatoandevenearlier.Ithasbeenembracedbyagamutadifferentindividualsthroughouthistory.TheseindividualsrangefromsensitiveartistslikeGeorgeBernardShawtothemanwhosenamehasbecomesynonymouswithevil,AdolfHitler.Similarly,anumberofdifferenteugenicsmovementshaverisenthroughoutthecourseofhistory,alsospanningthegamutintermsofgeneralmerit.However,noneoftheseeugenicsprogramspersistedforthetimeitwouldtaketosignificantlyalterthegenepoolofthetargetpopulation.Whethersuchaselectivebreedingprogramcouldeverbesustainedfortherequisitetimeisrapidlybecomingamootpoint.Soonwewillhavethetechnologicalknow-howtotransformthehumangenomeinasinglegeneration.Thescienceofgeneticengineeringoriginatedinthelate1960sandearly1970swiththediscoveryofrestrictionenzymes(Avise,1998).Whileinvestigatinghowvirusesandringsofdeoxyribonucleicacid(DNA)calledplasmidsinfectbacterialcells,recombine,andreproducethemselves,scientistsdiscoveredthatbacteriamakeenzymes,calledrestrictionenzymes,thatcutDNAchainsatspecificsites.RestrictionenzymesrecognizeparticularstretchesofnucleotidesarrangedinaspecificorderandcuttheDNAinthoseregionsonly.Eachrestrictionenzymerecognizesadifferentnucleotidesequence.Thus,restrictionenzymesformamoleculartoolkitthatallowsthechromosometobecutintovariousdesiredlengths,dependingonhowmanydifferentrestrictionenzymesareused.Eachtimeaparticularrestric...