2. Pictures: Which ones are natural clones and which ones are man-made? Warming up

3. 一株草莓依靠它沿地 “ 爬走 ” 的匍匐 茎, 一年内就能长出数百株草莓苗

4. 仙人掌每块落地就生根

5. 富贵竹插枝即活

6. Dolly 是世界上第 一例用体细胞 ─ 乳 腺上皮细胞, 通过 细胞核移植技术, 在复杂的人工操 作下, 得到的一只 小绵羊 。

7. 我国成功繁殖克隆兔 体形要比普通兔大许多 2002 年 5 月 中旬成功地 繁殖了一只 胚胎细胞克 隆兔。

8. 第一只克隆宠物猫

9. 克隆马及其 “ 母亲 兼姐姐 ”

10. What is cloning? What can cloning bring to us? More advantages or more problems? What is your opinion toward cloning human beings?

11. 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.

12. ___.Cloning has two major uses. ___.Cloning is a way of making an exact copy of another animal and plant. ___. The effect/ impact of Dolly. ___. It is forbidden to clone human beings. ___.The problems of Dolly. 1 2 3 4 5 Match the following with each para:

13. 2. Which of the following about cloning is NOT true according to text? 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.

14. 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

15. 4. The lamb is the clone of the cell from sheep B 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

16. 5. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 12

17. Problems of cloningAdvantages of cloning 1.Animals may develop ____ ________ of older animals. 1. Medical cloning could _______ ________ for serious __________ in humans. theillnesses produce cures illnesses

18. 2. Animal clones may ______ _________ than the donor animals. 2. Cloning plants can ________ _________ of similar quality ______ ______. 3. ______ _________ may want to clone themselves. 3. Cloning plants can be useful for research on _____ ______ ________. 4. There are ________ ____________ to cloning human beings. 4. Cloning can help save _______________ _________. die youngerproduceplants for sale leadersEvil plantspecies moral objectionsendangered animals new