[名校联盟]江西省信丰中学高中英语教学课件：Book8 Unit2 using language.pptVIP

Unit2 Using Language Reading ,discussing and writing Step 1 lead-in If I give you a chance to clone, what will you restore then? What will you restore if you have a chance? Step 2 Read and ansower 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 there is 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 have to live in a zoo? 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 can’t you clone the DNA of animals that have been extinct longer than 10,000 years? The DNA of animals more than 10,000 years old is not suitable for cloning ,for it can’t survive so long. Step 3 discussing May the best animal win ! Which extinct animals are worth restoring by means of cloning? Choose one and use the information to help you argue why this animal should be restored to the earth. Great Auk (1844) Auroch (1627) Dodo bird (1755) Quagga (1883) I have chosen the second one---Dodo bird. I think my choice is the best for the fellow reasons: Firstly, the Dodo bird is friendly and not harmful. Then the human beings wouldnt be afraid of it. And humans would be friends with them. Secondly, Dodo bird s large eggs and tasty meat that could be developed for food. If it is necessary, humans can take the advantage of these. Step 4 writing Paragraph1: the topic of the debate and who won Paragraph2: the ideas of the winning side Paragraph3: the ideas of the other side Paragraph4: conclusion and you