新人教版选修八Unit2_Using_Language课件

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?

2、 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 experimenting with

3、 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.FFFReading - I scanning ( 5ms )Give some reasons why it is eithe

4、r impossible or unsuitable 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.Reading - II Detail reading ( 6ms )Read the

5、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 been exti

6、nct 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? I

7、t 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 DNA o

8、f animals more than 10,000 years old is not suitable for cloning ,for it cant survive so long.DiscussionWhich extinct animals are worth restoring by means of cloning? TheaurochsisanextincttypeoflargewildcattlethatinhabitedEurope,AsiaandNorthAfrica.Itistheancestorofdomesticcattle.Thespeciessurvivedin

9、EuropeuntilthelastrecordedaurochsdiedintheJaktorowForest,Polandin1627. Thedodo isanextinctflightlessbirdthatwasendemictotheislandofMauritius,eastofMadagascarintheIndianOcean. Likemanyanimalsthatevolvedinisolationfromsignificantpredators,thedodowasentirelyfearlessofhumans.Thisfearlessnessanditsinabil

10、itytoflymadethedodoeasypreyforsailors.Althoughsomescatteredreportsdescribemasskillingsofdodosforshipsprovisions,archaeologicalinvestigationshavefoundscantevidenceofhumanpredation.Great aukquaggaLanguagepoints1.Thepopularityofthefilmproveshowinterestedordinarypeopleareinthesubjectpopularpopularity2.alongwayfromdoingsth.3.Do/make/carryout/performanexperimenton/in/with做.实验,对.做实验4.fromtimetotime有时；偶尔；时常5.bringbacktolife使复生6.Diversityinagroupmeanshavinganimalswiththe