人教课标版高中英语选修8-Unit2-Warming-up-and-Reading-(共32张PP课件.ppt--（课件中不含音视频）

1、Unit 2 CloningWarming up&Reading Task 1:How much do you know about clone?Look at the following pictures and discuss which ones are natural clones and which ones are man-made.Think about how they differ.A strawberry plantThe new plants that grow from the runners are exact copies of the original plant

2、.the runner纤匐枝纤匐枝Natural cloneNatural cloneGrowing new plantsThe gardener is going to put it into a pot to produce another plant.He is actually making a copy of the plant.man-made cloneman-made cloneNatural cloneNatural cloneThey are born naturally and are identicalin sex and appearance.Twinsclonedm

3、an-made cloneDolly the sheepDolly was a _ sheep while others were born naturally.-In biology,cloning is a way of making an exact copy of another animal and plant.Task 2:SummaryWhat is cloning?-To reproduce or propagate asexually (无性生殖或繁殖)5,000 B.C.Task 3:The development of cloning1952(USA)Task 3:The

4、 development of cloning1996 cloned sheep2001 Chinas first cloned twin cattleTask 3:The development of cloningcloned fluorescent(荧光的荧光的)pig and normal pig(China)Task 3:The development of cloning2005 first cloned dog (South Korea)Reading:Cloning:Where is it leading us?(1)Match the paragraph with the m

5、ain idea.Task 1:SkimmingWhat is the main idea of the text: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 because Dolly the sheep was born.D.Animal cloning raised arguments and scie

6、ntists are not sure about its future.Task 1:SkimmingMatch the paragraph with the main idea.Para 1A.The problems of Dolly.Para 2B.The two major uses of cloning and the difficulty in cloning animals.Para 3C.The different attitudes towards cloning.Para 4D.The definition of cloning and examples of natur

7、al clones.Para 5E.The effect of cloning in society.Task 1:Global Reading1.Cloning means making a copy of an animal or a plant.()2.Gardeners can make a lot of money by cloning plants.()3.Cloning animals is easier than cloning plants.()4.Dolly the sheep was the first successful clone of a mammal.()FTT

8、FTrue or FalseTask 2:Scanning5.The cloning of Dolly the sheep succeeded because the scientists were determined and work hard with patience.()6.The Chinese government is trying to reform the legal systems and forbids research into human cloning.()True or FalseTFThe definition of cloning-It happens bo

9、th in _ and in_.-They can be cloned by _ and by _.plantsanimalsthemselves humansNatural cloneMan-made cloneTask 2:Careful ReadingPara 1：Para 2:Task 2:Careful Reading1.How many major uses does cloning have?2.Which of the following about Dolly the sheep is correct?A.Dolly looked exactly like the sheep

10、 that provides the egg(卵卵).B.Dolly was the exact copy of the sheep that provides the nucleus(细胞核细胞核)C.Dolly looked like the sheep that gave birth to it.D.Dolly had characteristics of all three sheep.two major uses and the difficulty 1.How many major uses does cloning have?Para 2:Two.Firstly,commerci

11、al Secondly,researchPara 2:2.Which of the following about Dolly the sheep is correct?A.Dolly looked exactly like the sheep that provides the egg(卵卵).B.Dolly was the exact copy of the sheep that provides the nucleus(细胞核细胞核)C.Dolly looked like the sheep that gave birth to it.D.Dolly had characteristic

12、s of all three sheep.At first,the fact _ Dolly developed _ in a natural way was _.Later,the news _she had become seriously ill,and lived half the length of the life of the _sheep was _.Finally,the problem that occurred to the scientists was that a cloned animal lives_ the original one.(as long as/sh

13、orter than/longer than)Para 3:The problems of Dollythatnormallyencouragingthatoriginaldisturbingshorter thanAt LaterFinallyPara 4The word“controversial”in paragraph 4 probably means _.A.complicated B.uncontrollable C.arguable D.importantThe impact of DollyTrue or False:1.People feared that Cloned Hi

14、tlers would do harm to the world.()2.All the research into human beings will be forbidden.()3.Some countries will use cloning in a wise way.()FTTPara 5 Peoples reaction to cloningSome governments forbade research into human beings.4.Which of the following is not a problem of cloning mentioned in the

15、 text?A.Evil leaders would do harm to the world by cloning.B.Animal clones may develop the illness of older animals and may die younger than the donor animals.C.There are moral objections to cloning human beings.D.Too much cloning may lead to the destruction of the balance of nature.1.This article i

16、s in the _ person.2.Factual and _(formal/informal)language is used.thirdformalDiscussion of styleBecause _ the author does not state any personal opinion about cloning.3.Whats the writers attitude towards cloning?A.Objective(be fair)B.Negative(be against it)C.Positive(be in favor of it)DiscussionSince cloning is so great,what are the advantages of it?Does cloning have disadvantages?