高二英语选修8-unit2-cloning-课件

1、Unit 2 Cloning,Dolly the sheep and its baby,Cloned rabbit,克隆的荧光小猪(左)和正常小猪(右,克隆马及其“母亲兼姐姐,Reading I Scanning,Write the letter “T”if the statement is true. Write “F”if it is 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 ani

2、mals is as complicated as cloning plants,F,F,T,4. Dolly the sheep was the first successful clone of a mammal 5.Natural clones happen in animals as well as in plants,T,T,1. It can be inferred from the passage that a cloned animal_. A. usually lives as long as the original one B. usually lives longer

3、than the original one C. usually lives shorter than the original one D. is usually as healthy as the original one,Reading,2. Which statement is NOT true ? A. Cloning is something that has been developed quite recently. B. Twins that look exactly the same are originally from the same egg. C. Cloning

4、is used by gardeners to make more money. D. Animal cloning is much more difficult than plant cloning,3. The cloning of Dolly the sheep succeeded because_. A. its easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience C. the scientists were rewarded

5、 and got lots of money D. many other attempts to clone mammals failed,4. The lamb is the clone of the cell from sheep because_. A. it provides the egg cell B. it gives birth to the lamb C. it provides the nucleus D. it is a female sheep,5. The sheep that donated the somatic cell most probably lived

6、_ years. A. 3 B. 6 C. 9 D. 12,Careful reading,Read the letter again, then try to find the main idea of each paragraph,1.Cloning is _ 2.Cloning has _ uses. 3.The _ of Dolly. 4. The _ of Dolly. 5. It is _ to clone human beings,a way of making an exact copy of another animal and plant,problems,two majo

7、r,effect,forbidden,Problems or dangers of cloning,1. Animal clones may develop the illnesses of older animals,2. Animal clones may die younger than the donor animals,3. Evil leaders may want to clone themselves,4. There are moral objections to cloning human beings,Advantages of cloning,Medical cloning could produce cures for serious illnesses in humans,2. Cloning plants can produce plants of similar quality for sale,3. Cloning plants can be useful for research on new plant species,4. Cloning can help save endangered animals,意大利狂人医