人教課標(biāo)版高中英語選修8Unit2Reading(共20張)課件

1、Unit 2 CloningCloning is a way of making an exact copy of another animal or plant.It can be divided into natural clone and man-made clone. A natural clone is one that occurs in nature and a man-made clone is one that is obtained through human intervention(介入，干預(yù)).Whats clone?Warming up AloeIt is the

2、first cloned mammal (哺乳動(dòng)物）. Dolly the sheep Pre-reading How is Dolly created?Pre-readingFemale sheep A provides an egg cell.The nucleus is removed from the egg cell.The egg cell is ready for a new nucleus.Female sheep B provides a somatic cellThe nucleus is taken out of the somatic cell.The nucleus

3、and the egg cell are joined The cell divides and grows into an embryo.The embryo is put into female sheep C.Dolly the sheep is created.ReadingCloning: Where is it leading us? _ The birth and death of Dolly. _Scientists are confused about the future of clone. _ What is the cloning._Controversy brough

4、t by Dolly . _ Two major uses of cloning. 2 3 145Fast-reading main idea of each paragraph 1.The main idea of the text is_ A. animal cloning is very valuable and can benefit the world. B. animal cloning could be misused by bad people so it must be forbidden. C. animal cloning is well developed becaus

5、e Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future.Choose the right answer according to the text.careful reading 2. The cloning of Dolly the sheep succeeded because_. A. its easier to clone a sheep than other animals B. the scientists were det

6、ermined and worked hard with patienceC. the scientists were rewarded and got lots of moneyD. many other attempts to clone mammals failedcareful reading 3. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 12careful reading 4. As for the cloning procedure of Dolly

7、 the sheep, all of the following are true EXCEPT _.A. the lamb is the clone of the donated cell from sheep BB. electricity is neededC. female sheep B provides an egg cellD. three female sheep are usedcareful reading 5. From the last paragraph we know that _.A. cloning will come to an end because of

8、objections B. cloned human beings will be produced in the near futureC. many countries will use cloning in a wise wayD. all the research into human cloning will be forbiddencareful reading 6.The writers reaction towards cloning is_ A. Positive B. Negative C. neutral D.indifferentcareful reading Defi

9、nition2 major uses of cloning Cloning procedureIt is a way of _ of another animal and plant.1)to produce _quantities of plants . 2)It is valuable for research on new _and for _ research on animals . Cloning plants is _ while cloning of animals is _.The cloning of_ is a _ in cloning tech as a result

10、of scientists _& patience.making an exact copycommercialplant speciesmedicalstraightforwardcomplicatedDolly the sheepbreakthroughdeterminationobjectionsThe problems of Dolly the sheep It opened everybodys eyes to the possibility of using cloning to cure _and even producehuman beingssix and a halfori

11、ginalserious illnessesmedia Disturbing news:It lived for _ _ _ _ _ _ _ years, half the Length of the life of the _ sheep. Its appearance raised a storm of _ and had a great impact on the _and public imagimation.The effect of theDolly sheepArguments on cloning Evil leaders hope to clone themselves. R

12、eligious leaders raised _ questions. Many governments _ research into_ but some countries continued to _evidence of the abundant medical aid.moralforbadeaccumulatehuman cloningproconA: I think cloning is good for us. BecauseB: I think cloning is bad for us. Because DebateTopic: Is cloning good or bad for us ? Debate steps:Step1:free debates (each debater deliver your opinion no more than 1 minute and start from the pro)Step2: summary summarize the statement by t