高二英语选修8-unit2-cloning-课件.pptVIP

4. Dolly the sheep was the first successful clone of a mammal 5.Natural clones happen in animals as well as in plants. 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 than the original one C. usually lives shorter than the original one D. is usually as healthy as the original one 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 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 and got lots of money D. many other attempts to clone mammals failed 5. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 12 Problems or dangers of cloning 1. Animal clones may develop the illnesses of older animals. * * 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 animals is as complicated as cloning plants. F F T T T Reading 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