1、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.,暴龙 tyrannosaurus,剑龙 stegosaurs,角龙 ceratopsids,翼龙 pterodactyl,雷龙 brontosaurus,Does the author believe the dinosaurs can be
2、 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
3、 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 l
4、ive 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.,1. The film Jurassic Park is popular because _. A. people are interested in the subject of
5、 cloning B. all the actors are dinosaursC. it was directed by a scientist who clones dinosaursD. 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 “Biso
6、n” 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 illnessesC. the illness is a new oneD. their arrangement
7、 of genes can not resist that new disease,Fill in the blanks according to the text.,ordinary people,Reasons,diversity,suitable habitat,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
8、 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
9、 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,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其后代抵抗 这种病的能力。,单词讲解,resist 词义 vt. 抵制, 抵抗 派生词 resistance n. 抵抗, 反抗; 抗性; 抵抗力; 耐性 r
10、esistant adj. 抵抗的; 防的；抗的 resister n. 抵抗者 resistibility n. 可抵抗性；抵抗力,常用搭配 resist sth. /doing sth. 抵制某事/做某事 cant resist sth./ doing sth. 禁不住某事/做某事 resist the enemy/ temptation 抵抗敌人/抵制诱惑,根据汉字提示完成句子。 (1) We are determined to stay and _ (抵抗敌人). (2) Tom _ (忍不住开玩笑) about his strange hairstyle. (3) Quite a f
11、ew people in power _ _ (抵制不住金钱的诱惑) and disobey the law.,cant resist the temptation of money,resist the enemy,couldnt resist playing jokes,( ) Although a teenager, Peter resisted _ what to do and what not to do.A. telling B. being toldC. to tell D. to be told,【解析】B 考查resist的用法。resist doing sth. 抵制做某事
12、, 且主语Peter 和tell之间是被动关系, 故B正确。,B,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.,长难句分析,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。i
13、n 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 thei
14、r 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。,base on/upon 以为基础, 依据 其结构为: base sth. on/uponsth. is based on/upon,4. Based on what we know now, you cannot clone animals that have been extinct longer than 10000 years
15、. 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
16、. kept up B. resist C. live on D. relived3. 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 invain if there is not enough diversityA. go to west B. useless C. helpless D. meaningless 5
17、. Others will survive and pass on theability to resist that disease to the next generation.A. oppose B. slide C. hire D. indicate,6. So the chance of dinosaurs everreturning to the earth is merely adream.A. only B. surely C. abruptly D. miserably,May the best animal win! Which extinct animals are wo
18、rth restoring by means of cloning? Look at the table on page 16 and look for some information on the internet to help you and choose one of them to talk with your partner.,Discussion,Animal testing, also known as animal experimentation or animal research, is the use of non-human animals in experimen
19、ts.,Pre-listening,Listening,Is cloning with animals cruel? Think of your point of view and talk with your partner. Xiao Qing and Rachel are discussing whether cloning is cruel to animals or not. Listen and see whether you agree with Xiao Qing or Rachel.,Listening,1. Read these statements before list
20、ening. Tick those that you hear. Cloning will bring dead pets to life. There were 627 experiments before Dolly was successfully cloned., Cloning may help cure serious illnesses. Its a dead end. Dolly the sheep was “middle-aged” when she was born. So your grandmother would be able to start her life a
21、ll over again and live much longer.,2. Listen to the tape again and fill in the chart.,1 cruel to animals,1 scientists are doing a wonderful job,2 makes the animals do unnatural things,2 may bring peoples favourite pets back to life,4 weakens the species,4 it may provide cures for serious illnesses,
22、3 it is a “dead end”,3 problems because it is a new science,3. Whose ideas do you agree with?Get ready to have a class discussion. Think about the reasons for your point of view. Use your own ideas as well as those in the text.,Sample dialogue,XIAO: I agree with animals cloning. I think we must be s
23、afe so animals are needed to test things first. LEI: No, I cant agree with that because animals are alive too. Dont they deserve a good life?,DAVE: I agree with XIAO because we wont know if cloning is safe for humans unless we try it on animals first. LILY: How can you believe that? Leis argument is
24、 correct. If we make animals live unnatural lives and do unnatural things, then it wont be good for them or us.,XIAO: But the scientists are trying their best to make things better for the animals. They want them to have as natural a life as possible. Your ideas are not reasonable. Unless we try thi
25、ngs out on animals, cloning may not be safe for human beings.,DAVE: Your arguments have convinced me, Xiao. I will vote with you. LILY: Leis arguments sound more encouraging to me. I support a better life for animals used in cloning experiments. LEI: Thank you Lily. Thank you for your support.,The rest two Aurochs and Quagga are left for you. Follow the examples, and write your own report.,Homework,Thank you!,