Reading1英语.ppt

Unit 2 cloning Which ones are natural clones?Which ones are man-made? How do they differ.Warming upA strawberry plantGrowing new plantsNatural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that produced through human intervention(介入介入) .Dolly the sheepShe was cloned while the others were born naturally. In other word, Dolly was a ______ sheep.clonedHow does Dolly differ from other sheep?Pre-reading – add your questions to the listQuestion list about cloning 1. What is a clone?2. How is a clone produced ?3. What benefits can humans gain from cloning?4.What problems may arise when humans are cloned? 5. …6. …CLONING: WHERE IS IT LEADING US?Predict: To which question from our list the answer might be found in this passage? Fast reading3 mins 2. Outline – key word for each paragraphPara. 1 __________Para. 2 __________Para. 3 __________Para. 4 __________Para. 5 __________Read for 1.Main idea of the passage Introduction/ definitionUses and breakthroughProblems of Dolly the Impact of cloningPeople’s reaction to cloning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 because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future.main idea1.Dolly the sheep_____. A. looked exactly like the sheep that provides the egg. B. was the exact copy of the sheep that provides the nucleus. C. looked like the sheep that gave birth to it. D. had the characteristics of all three sheep. ＊＊Reading – II Skimming ( 5ms )Choose the right answer according to the text.2. It can be inferred from the passage that a cloned animal_____. A. usually lives as long as the original one B. usually lives longer than the original one C. usually lives longer than the original one D. is usually as healthy as the original one＊＊3. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 12＊＊4. Which of the following is not an advantage of cloning?A.Cloning can be used for medical purposes. B.Large quantities of food can be produced by cloning.C.Cloning can help keep animals from becoming extinct.D.Famous persons who have passed away can be cloned.＊＊5. In the second paragraph, the word “straightforward” means ____.A. uncomplicated B. honest C. frank D.difficult＊＊6. Which of the follow is NOT a problem or danger of cloning according to the text?A.Cloned Bin Ladens would do harm to the world.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.＊＊Cloning is a way of making an exact copy of another animal and plant.What is cloning ?Cloning happens both in ______ and in_______. They can be cloned by ________ and _______.plantsanimalsthemselveshumansNatural cloneMan-made clonePara 1 fill the blanksIntensive Reading 1.How many major uses do cloning have? Firstly, …commercial… Secondly, …research…2. When was the cloning of Dolly the sheep born? Why did the scientists succeed in cloning it?Para 2Read together1996. It was their determination and patience that paid off. The major uses and breakthrough of cloningAt first, the fact that Dolly developed ________ in a natural way was __________.Later, the news _____she lived for six years, half the length of the life of the ______ one was __________.Finally, the problem that occurred to the scientists was that a cloned animal lives_________ than the original one.Para 3The problems of Dollynormallyencouragingorginalthatdisturbingshorterread freely1. The fact that she seemed to develop normally was very encouraging.2. Then came the disturbing news that Dolly had become seriously ill. Appositive clause We can infer from the last three paragraphs that ___.A. The normal development of Dolly had no effect on the cloning of other species.B. Dolly’s serious disease and final death disturbed the whole world.C. Dolly successfully cloned a new lamb with the help of cloning scientists.D. There were arguments about animals about animal cloning and concerns about the future of cloning.Para 4& 5The impact and people’s reaction to cloning＊＊ 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 writer’s attitude towards cloningBecause_________________________________________________________________Homework1. 创新作业本创新作业本 period I2. Finish Ex.1,2,3, Page12.我国成功繁殖克隆兔 体形要比普通兔大许多2002年年5月月中旬成功地中旬成功地繁殖了一只繁殖了一只胚胎细胞克胚胎细胞克隆兔。

隆兔第一只克隆宠物猫第一只克隆宠物猫克隆马及其克隆马及其“母母亲兼姐姐亲兼姐姐”2002年年4月十六月十六日美国第一头日美国第一头克隆牛克隆牛“艾米艾米”产下牛犊喜产下牛犊喜作妈咪作妈咪克隆的荧光小猪克隆的荧光小猪(左左)和正常小猪和正常小猪(右右)A strawberry plantA strawberry plantThe new plants that grow from the runners are exact copies of the original plant.富贵竹插枝即活富贵竹插枝即活Lucky bamboo The gardener should cut the plant ,then the cutting produce another new plant.TwinsThey are born naturally and identical in sex and appearance.。