人教选修8 Unit2 Cloning Where is it leading us 课件.ppt

高二人教新课标版选修八;;In pairs, look at the four pictures and discuss: which ones are natural clones which ones are man-made. Think about how they differ.;Dolly the sheep;natural clone;Growing new plant.;Twins;In pairs discuss what you understand about cloning. Then list the questions you want to find out. Share your lists with one another. ;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?;Reading;Skimming;Skimming;True or false: 1. 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 as complicated as cloning plants. ;T;1. What is the main topic? A. Cloning. B. Dolly the sheep . C. It will lead us to some places. 2. What is the writing style? A. Expositive (说明性的). B. Descriptive. C. Argumentative (议论性的).;3. 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.;4. 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 dies earlier than the original one D. is usually as healthy as the original one;5. 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.;6. The word “controversial” in para 4 probably means ____________. A. complicated B. arguable C. important D. necessary;7. Which statement is NOT true? A. Cloning is something that has been developed