M5Unit3Welcometotheunit.ppt

Science and nature Discussion1.Do you think the fast development 2. of science and technology has been good for nature? Why or why not?3.2. How should science and nature4. relate to each other?5.3. Do you think that human beings 6. should try to control nature?7.4. Should we do anything against 8. nature? Why or why not?Welcome to the unit1.What do you know about cloning?2. A clone is an animal or a plant copied from the cell of another animal or plant. The two animals or 3. plants are exactly the same.4.2. What animals have already been cloned?Dolly and its creator Ian WilmutWhat do you know about Dolly?Øthe world’s first cloned mammalØcreated by Scottish scientists in 1996Ødied in 2003 because of lung diseaseØmany countries have banned human cloning since Dolly’s birththe cloned female pigs  The five little pigs’ names are Noel, Angel, Star, Joy and Mary. They were born in the USA and their organs(器官器官) are more suitable for transplantation(移植移植) into humans. It is hoped that the organsfrom these pigs will be used in humans’bodies.the cloned kitten, born in 2002The kitten in the picture is called Cc. Its name is from “Copycat”. Scientists in the USA created it with a cell taken from its mother, Rainbow. It was born in December 2002.the first cloned monkey, born in 2000The name of the cloned monkey is ANDi. It is from “inserted DNA” spelt backwards. It is the first genetically modified monkey. The technology is different from that used for Dolly.Do you think the cloned animals are as healthy as the natural ones?Dolly is, but scientists do not yet know whether this is the exception(例外例外) or the rule. Some early evidences suggest that clones may have health problems and that they may age prematurely(早衰的，未老先衰早衰的，未老先衰).If you are a scientist, what do you want to clone? Why? Fun picturesFun picturesIf cloning goes wrong, what will happen?A dog or an eagle?A duck or a crocodile?A duck or a crocodile?A cock or a dog?A lion or a kangaroo?A frog or a crocodile?A frog or a crocodile?A tortoise or a bear?A bird or a dog?A bird or a dog? What do you think of the new kind of technology? Does it have advantages or disadvantages?Do you think governments should pass laws to prohibit human cloning? Why or why not?They shouldn’t, for…reasons:1.Cloning can help cure many 2. diseases and save a lot of 3. people lives. 4.2. ……5.3. ……Part AThey should, for…reasons:1.Cloning can lead to 2. ethical(伦理伦理) problems.3.2. ……4.3. …… Part BGiving an oral reportToday our class had a discussion about whether the governments should pass laws to prohibit human cloning.Some students think that the governments should, for…However, some other students thinkit necessary to prohibit…, for…In my opinion, …Thank you for your attention!Homework 1.Find more information about clone.2.2. Review the new words.。