Unit-2-Cloning-Uusing-language課件-新人教版選修8課件.ppt

1、Is cloning cruel?,Listen and see whether you agree with Xiao Qing or Rachel.,Listening,Tick those that you hear. 1. Cloning will bring dead pets to life. 2. There were 627 experiments before Dolly was successfully cloned. 3. Cloning may help cure serious illnesses. 4. Its a dead end. 5. Dolly the sh

2、eep was “middle-aged” when she was born. 6. So your grandmother would be able to start her life all over again and live much longer.,Listen and finish the following chart:,unnatural things,“dead end”,weakens,wonderful,back to life,provide cures,cruel,The return of the dinosaurs ?,1.Why shouldnt you

3、clone an extinct animal if there isnt enough diversity in the group? 2.Why is it wrong to clone an extinct animal if it would live in a zoo?,Reading,1.Why shouldnt you clone an extinct animal if there isnt enough diversity in the group?,There will not be enough genetic variation in the group to be a

4、ble to resist new illnesses.,2. Why is it wrong to clone an extinct animal if it would 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.,Listen long horns and hair; hair good for making into clothes; horn

5、can be used for decoration; need grasslands.,Dodo bird (1755),Unable to fly; friendly and not harmful; large eggs and tasty meat that could be developed for food; needs hot climate.,Great Auk (1844),Very large bird that cannot fly；lives by and in the sea; feathers do not absorb water; useful for protecting clothes from water.,Quagga (1883),Skin looks like a zebra; can be used for decoration; meat very tasty; needs warm climate.,She resisted being carried off. 她拒絕被帶走。 She could not resist the temptation. 她無法抗拒那