選修八 Unit2Cloning Warming and Speaking 課件

1、period 1 warming up& reading commercial undertake pay off twins straightforward cast down a strawberry plant the plant produces its own the plant produces its own runners.runners. a stem take from growing plants to make new ones. they are identical in sex and appearance, who are produced from the sa

2、me original egg. she was c_while the others were born naturally. it is the exact copy of another sheep and the first cloned mammal. different from loned dolly the sheep cloning is a way of making an exact _ of another animal or plant. what is cloning? copy clone, also called reproduce asexually (無(wú)性生

3、殖無(wú)性生殖 /繁殖繁殖), is the creation of cells or whole animals using dna from a single “parent”, without using the normal reproductive (有性生殖有性生殖) process. the clone has the exactly same dna to the parent. it includes natural and man-made clone. what will you think of ? curecure . dollydolly twinstwins the

4、same the same genegene what is the difference among them ? natural clone man-made clone clone have you ever wished you could have a clone of yourself to do homework while you had a rest or went out with your friends? a clone is an animal or plant produced naturally or artificially from the cells of

5、another animal or plant and is exactly the same as it. what is a clone? pre-reading how is a clone produced? the cloning of plants is simple and relatively easy. it can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). the cloning of animal

6、s is more complicated. it was not achieved until 1996 and is fully explained in the first reading. what benefits can humans gain from cloning? medical cloning can help cure serious illnesses that ruin ones quality of life. it can help infertile people have babies. what problems may arise when humans

7、 are cloned? people may want to clone themselves so they can live forever. people may want to clone dead children. people may want to clone their favourite pets. prediction what do you think the article is about by reading this headline? what is the main idea of the passage? the passage tells us tha

8、t animal cloning _ and scientists are not sure about its_. arguments future what is the writing style? a. expositive(說(shuō)明文說(shuō)明文) b. descriptive（記敘文）（記敘文） c. argumentative（議論文）（議論文） fast reading: get the main idea of each paragraph (find out key words to help you) para. 1 para. 2 para. 3 para. 4 para. 5

9、d: what is cloning? e: major uses of cloning and the procedure of animal cloning a: the problems of dolly c: the effect of dolly b: arguments and concerns about cloning definition 2 major uses of cloning cloning procedure the first successful animal clone it is a way of _ of another animal and plant

10、. 1)to produce _ 2)it is valuable for research on new _and medical research on _. cloning plants _while cloning of animals is _ the cloning of_, a _ in cloning tech. making an exact copy commercial straightforward breakthrough plants species animals dolly the sheep complicated which of the following

11、 statements about cloning is 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. the c

12、loning 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 the determination and patience of the t

13、he determination and patience of the scientists scientists was rewardedwas rewarded/ / paid offpaid off. . the problems of dolly the sheep the effect of dolly the sheep encouraging news : it seemed to develop _ and produced _in a _way. disturbing news: it lived for _ years, half the length of the li

14、fe of the _ sheep. its appearance raised a storm of _and had a great impact on the _ and public_. it opened everybodys eyes to the possibility of using cloning to cure _and even produce _. objections human beings normally natural 6 original imagination serious illnesses media a lamb argument s on cl

15、oning evil leaders hope to clone _. religious leaders raised _ questions. many governments _ research into human cloning. some countries continued to _evidence of the abundant medical aid. moral forbade themselves accumulate cloning is valuable for _research on animals. medical problems of cloning a

16、nimal clones may develop the _ of older animals illnesses animal clones may die _ than the original animals. younger _ _may want to clone themselves. there are_ _to cloning human beings. advantages of cloning medical cloning could produce _for serious illnesses in humans. cures cloning plants can pr

17、oduce large _ of plants for _. quantities cloning plants can be useful for research on _ _ _. species evil leaders plant sale moral new objections we can conclude _ a. cloning is good for us. b. cloning has two aspects. c. if cloning is used in a correct way it can bring many convenience to us. d. i

18、f cloning is used in an evil way it can cause much trouble. we should use cloning in a wise way ! as a coin has two sides, everything has two aspects. on one hand, if cloning is used in a correct way it can bring many convenience to us. on the other hand, if cloning is used in an evil way it can cause much trouble. therefore, we should use cloning in a correct way. reading i scanning write the letter “t”if the statement is true. write “f”if it is false. 1