人教版高二英语选修八 Unit2cloning reading 课件 (共22张PPT).ppt

1、Natural clone orMan-made clone？Dolly the sheepA strawberry plantGrowing new plantsTwins is one that occurs in nature.A natural cloneis one that is produced through human intervention.(人类介入）A man-made cloneDolly the sheepShe waswhile the others were born.How does Dolly differ from other sheep?clonedn

2、aturallySkim the passage and get the main idea of each paragraph.Para 1Para 2Para 3Para 4Para 5The definition of cloningThe two major uses and the Procedure of cloningThe problem of DollyThe effect of cloning in societyThe attitudes towards cloningWhats the writing style?A.Expositive(说明性的)B.Argument

3、ative（议论性的）C.Narrative（叙事性的）D.Descriptive（描写性的）Para 1 The definition of cloningdefinition:It is a way of making an exact copy of another animal and plant.Cloning happens both in _ and in_.They can be cloned by _ and_.plantsanimalsthemselveshumansNatural cloneMan-made clone1.The word“straightforward”

4、means _.A.uncomplicated B.honest C.frank D.difficultPara 2The major uses and procedures of cloning 2.The cloning of Dolly the sheep succeeded because_.A.its easier to clone a sheep than other animals B.the scientists were determined and worked hard with patience C.the scientists were rewarded and go

5、t lots of money D.many other attempts to clone mammals failedThe determination and patience of the scientists paid off.(L9)3.The lamb is the clone of the cell from sheep B because .A.it provides the egg cellB.it gives birth to the lambC.it provides the nucleusD.it is a female sheep产出有核卵细胞无核卵细胞体细胞取出细

6、胞核用电融合细胞代孕母羊细胞分裂形成胚胎How to produce a sheep（我也来当科学家）True or false:1.Four female sheep participate in the cloning of a new sheep.2.Electricity is needed in the procedure.3.Sheep B provides a somatic cell for the clone.4.The lamb is the exact copy of sheep A.TFTFn At first,the fact that Dolly seemed to

7、 developed _ was _.n Then,came the news that Dolly became_.n Altogether Dolly lived_,half the length of the life of _.Para 3The problems of Dollynormallyencouragingthe original sheepseriously illsix and a half yearsThe sheep that donated the somatic cell most probably lived _years.A.3 B.6 C.9 D.13Pr

8、oblems:Cloned animals may develop the_of older animals.Cloned animals may lives _ the original one.as long as/shorter than/longer thanillnessesshorter than The word“controversial”in paragraph 4 probably means_.A.complicated B.arguable C.importantPara 4The impact of Dollyn On the other hand,Dollys ap

9、pearance raised a storm of objections and had a great impact on the media and public imagination.TranslationTrue or false:1 People feared that Cloned Hitlers would do harm to the world.2 All the research into human beings will be forbidden.3 Some countries to accumulate evidence of the abundant medi

10、cal aid that cloning could provide.Para 5 Peoples reaction to cloningMany governments forbaderesearch into human cloning.Cloning is a way of _ an exact copy of another animal or plant.Cloning has two _ uses.Firstly,gardeners use it to produce plants.Secondly,it is _ for medical research on animals.C

11、loning plants is straightforward but the cloning of animals is more_.The procedure is difficult to _.In 1996,scientists succeeded in _Dolly the sheep.Then came the disturbing news that Dolly was ill._ Dolly lived for six years and a half,Dollys appearance raised a storm of _.Government became nervou

12、s and many _ research into human cloning.Scientists still _ whether cloning will help or harm us and where it is leading us.making majorvaluable complicatedundertake cloning Altogether objections forbade wonder SummaryAs a coin has two sides,everything has two aspects.On one hand,if cloning is used

13、in a correct way it can bring many convenience to us.On the other hand,if cloning is used in an evil way it can cause much trouble.Therefore,we should use cloning in a correct way.the author does not state any personal opinion about cloning.A.Objective(be fair)B.Negative(be against it)C.Positive(be in favor of it)The writers attitudetowards cloningBecause_HomeworkPreview language points in the text.