吉林省伊通满族自治县第三中学校高中英语人教版选修8课件：UNIT 2 CLONING-USING LANGUAGE .ppt

1、Unit 2 cloning using language The Return of the Dinosaurs?Answer the following questions:1.Have you ever seen the film Jurassic Park?Do people like this film?What animals do you see in the film?Are they real dinosaurs?Warming up (4ms)2.Do you like dinosaurs?Can you see them in our real life?Why?Warm

2、ing up (4ms)3.Do you think it is possible to clone dinosaurs?If not,why?If yes,do you think thats good for human beings?Why?Warming up (4ms)Read the text,then tell the following sentences are true or false.(Students can discuss in pairs.)1.Scientists are still experimenting with cloning mammals beca

3、use they think it can make money.2.The animals that have disappeared from the earth,like dinosaurs,can be brought back to life through cloning.3.If we can clone any extinct animals,we should let them live in a zoo.FFFReading-I scanning(5ms)Give some reasons why it is either impossible or unsuitable

4、to clone extinct animalsReason 1:Reason 2:Reason 3:You need perfect DNTThere is not enough diversity for cloned animals to overcome new diseases.It would be unfair to clone any extinct animals if they would have to live in a zoo.Advantage of diversity Disadvantage of diversityDiversity in a group of

5、 cloned animalsIf there is a new illness some of these animals may die,but others will survive and passed on the ability to resist that disease to their children.They would all have the same arrangement of genes and so they might all die of the same disease.Reading-II Detail reading(6ms)Read the tex

6、t,then answer the following questions.(Students can discuss in pairs.)1.Why shouldt you clone an extinct animal unless there is enough diversity in the group?2.Why is it wrong to clone an extinct animal if it would have to live in a zoo?3.Why cant you clone the DNA of animals that have been extinct

7、longer than 10,000 years?1.Why shouldt you clone an extinct animal unless there is enough diversity in the group?There will not be enough genetic variation(遗传变异)in the group to be able to resist new illnesses.2.Why is it wrong to clone an extinct animal if it would have to live in a zoo?It is not a

8、good idea to clone an animal that would have to 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 mor

9、e than 10,000 years old is not suitable for cloning,for it cant survive so long.Reading-III Argument (10ms)1.Read the passage again and have a argument according to the requirement of Ex.2 on Page 16.2.Students work in groups,when discussing,the head of each group should write down the opinions of a

10、ll the members.3.Ask some volunteers to show their opinions.Language points1.The popularity of the film proves how interested ordinary people are in the subjectpopular popularity2.a long way from doing sth.3.Do/make/carry out/perform an experiment on/in/with做.实验,对.做实验4.from time to time有时；偶尔；时常5.bri

11、ngback to life 使复生6.Diversity in a group means havinganimals with their genes arranged in different ways.mean doing sth.have sth.done7.but others will survive and pass on the ability to resist that disease to their children.pass onto传递;留给当堂检测1.The genes of the cloned animal are so arranged that it c

12、annot _such a disease,so it soon died.A.keep B.stop C.exist D.resist 2.You have to be firm,but _you should be sympathetic.A.from time to time B.at one time C.at a time D.in time 3.He said nothing,_smiled and watched her.A.most B.merely C.generally D.hardly 4.All their hard work has _!The house is fi

13、nished at last.A.paid back B.paid for C.paid off D.paid 5.Further information can be _from our head office.A.obtained B.achieved C.resisted D.proved 6.Allen and I are in the same history class,but his assignment differs _ mine.A.on B.from C.in D.to7.The two sides in the dispute still differ _each ot

14、her _the question of pay.A.on;with B.with;on C.at;with D.from;in 8.As we are very busy these days,we might _this urgent work for the time being.A.undertake B.agree C.employ D.charge 9.It is very_ that there has been an increase in crime in the last six months.A.disturbed B.disturbing C.disturb D.bei

15、ng disturbed 10.Her father_ her to go out alone.A.hoped B.allowed C.forbade D.permitted 11.We hope there will be a new_ in high-technology in China.A.breakdown B.breakup C.breakthrough D.breakout 12.Dust _in a room if we do not clean the room regularly.A.accomplishes B.accumulates C.accommodates D.achieves13.They strongly object to _the plan.A.giving up B.give up C.giving off D.give off 14.I am not _satisfied with the decision.A.exactly B.altogether C.properly D.naturally 15.Since he heard of his failure at the examination,Tom has been very_.A.cast down B.put down C.turned down D.taken down