河北省迁安一中高二英语：book8Unit2《Cloning》Using Language课件2（人教版）.pptVIP

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? Warming up ( 4ms ) 3. Do you think it is possible to clone dinosaurs? If not,why? If yes, do you think that’s 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 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 Reading -- I scanning ( 5ms ) Give some reasons why 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. Advantage of diversity Disadvantage of diversity Diversity in a group of 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 ) Read the text, then answer the following questions. ( Students can discuss in pairs. ) Why should’t 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 can’t you clone the DNA of animals that have been extinct longer than 10,000 years? Why should’t you clone an extinct animal unless the