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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,人教课标,高二 选修 8,Unit 2,Unit 2 Cloning,1.Do you know anything about dinosaurs?,2.Have you ever seen the film,Jurassic Park,?,The return of the dinosaurs?,Warming up,Enjoy some pictures about dinosaurs.,霸王龙,tyrannosaurus,剑龙,stegosaurs,角龙,ceratopsids,翼龙,pterodactyl,雷龙,brontosaurus,Do the author believe the dinosaurs,can be cloned?,Skimming,The writer of the text _.,A.is excited by the possibility of cloning fierce and extinct animals,B.believes that extinct animals can be brought back to life by cloning,C.thinks it impossible or unsuitable to clone extinct animals like dinosaurs,D.dreams of dinosaurs returning to the earth,Answer the following questions:,Detailed reading,1.Why shouldnt you clone an extinct animal if there isnt enough diversity in the group?,There will not be enough genetic,variation in the group to be able to,resist new illnesses.,2.Why is it wrong to clone an extinct,animal if it would live in a zoo?,It is not a good idea to clone an animal that would live in a zoo because it is not a suitable habitat to develop and increase its numbers.The zoo is not a natural environment for a wild animal.,3.Why cant you clone the DNA of animals that have been extinct longer than 10,000 years?,The DNA of animals more than 10,000 years old is not suitable for cloning,for it cant survive so long.,1.The film,Jurassic Park,is popular because _.,A.people are interested in the subject,of cloning,B.all the actors are dinosaurs,C.it was directed by a scientist who,clones dinosaurs,D.it proves very interesting,Choose the best answers.,A,2.Which of the following is true?_,Mice were cloned in 1981.,B.Dolly the sheep was the first cloned animal.,C.The name of the cloned cow is“Bison”,D.China was successful in cloning mammals.,3.The reasons why a group of cloned,animals all die of the same illness do,NOT include _.A.they have the same arrangement of genes B.there isnt enough diversity in the group for it to overcome illnesses,C.the illness is a new one,D.their arrangement of genes can not resist that new disease,Fill in the blanks according to the text.,People interested in,Not only film makers but also _.,_ for its impossibility,Perfect DNA is needed.,There is not enough _ in the group.,A(n)_ would be needed for the cloned extinct animals.,ordinary people,Reasons,diversity,suitable habitat,_,The chance of dinosaurs returning to the earth is _.,merely a dream,Conclusion,We can infer from the text that _.,A.scientists are experimenting to clone dinosaurs,B.dinosaurs will never return to the earth,C.cloned animals will only live in the zoo,D.the DNA of dinosaurs can only survive 10000 year,Post-reading,True or false according to the text.,Scientists are still experimenting with cloning mammals because they think it can make money.,The animals that have disappeared from the earth,like dinosaurs,can be brought back to life through cloning.,If we can clone any extinct animals,we should let them live in a zoo.,F,F,F,1.The popularity of films such as,Jurassic Park,in which,a scientist clones several kinds of extinct dinosaurs,proves,how,the idea struck a mixture of fear and excitement into peoples hearts.,长难句解析,在侏罗纪公园这部电影中,有一位科学家克隆了好几种不同的绝种恐龙。类似这样的电影很受欢迎,证明了这一想法使人们感到既兴奋又恐惧。,in which,引导定语从句,how,引导宾语从句。,2.,From time to time,people suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.人们时常设想灭绝的动物,例如恐龙,有可能通过克隆技术使它们复活。,from time to time,有时,间或,偶尔,=occasionally,now and then。,3.Diversity in a group means having animals,with their genes arranged in different ways,.群中的多样性指的是拥有基因排列方式不同的动物。,with their genes arranged in different ways,作定语,in different ways 以不同的方式。,4.but others will survive and pass on the ability to,resist,that disease to the next generation.,.其他的将存活下来并传递给其后代抵抗这种病的能力。,resist 作及物动词主要有三个义项:,抵抗,对抗;抵挡,防止;,(与cannot,could not连用),无法抗拒,无法抵挡。,base on/upon,以,为基础,依据,其结构为:,base sth.on/upon,sth.is based on/upon,5.,Based on,what we know now,you cannot clone animals that have been extinct longer than 10000 years.据我们现在所知,绝种一万年以上的动物不能克隆。,Choose the right answer.,1.proves how the idea,struck,a mixture of fear and excitement,into peoples hearts.,A.have sth.on the brain B.confused,C.droved people crazy D.scared,2.People suggest that extinct animals like dinosaurs,can possibly be,brought back to life,.,A.kept up B.resist,C.live on D.relived,3.The,initial,requirement is that you need perfect DNA.,A.most thankful B.most pressing,C.most difficult D.most needed,4.All efforts of cloning an animal will be,in vain,if there is not enough diversity,A.go to west B.useless,C.helpless D.meaningless,5.Others will survive and pass on the ability to,resist,that disease to the next generation.,A.oppose B.slide,C.hire D.indicate,6.So the chance of dinosaurs ever,returning to the earth is,merely,a,dream.,A.only B.surely,C.abruptly D.miserably,May the best animal,win!,Which extinct animals are worth restoring by means of cloning?Look for some information on the internet to help y
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