选修8unit2usinglangguage

1、选修8 unit2 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

2、life? Why?,Warming 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. ),Scientists are still experimen

3、ting 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,Reading - I scanning ( 5ms ),Give some reasons w

4、hy it is either impossible or unsuitable to clone extinct animals,Reason 1: Reason 2: Reason 3:,You need perfect DNT There 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.,Diversity in a group of

5、 cloned animals,If 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 ),Re

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

7、en extinct longer than 10,000 years?,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 zo

8、o?,It is not a 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

9、DNA of animals more 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

10、write down the opinions of all the members.3. Ask some volunteers to show their opinions.,Language points 1.The popularity of the film proves how interested ordinary people are in the subject popular popularity 2.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.bringback to life 使复生 6.Diversity in a group means having animals with their genes arr