《幻燈片9-26頁》ppt課件

1、Unit 2 Cloning Period 1&2: 幻燈片9-26頁Which group is real twins?Warming up ( 5ms ) Warming up ( 5ms ) Are the following clones the same? If not, what is the difference?NO. The twins are _clones.natural Dolly is an example of _ cloneman-madeWhat is cloning?It is a way of making an exact copy of anot

2、her animal and plant. Read the text fast and try to finish the exercise on the paper Reading I Skimming 1.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

3、 characteristics of all three sheep. Reading I Skimming Choose the right answer according to the text.2. 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 on

4、e D. is usually as healthy as the original one3. The cloning of Dolly the sheep succeeded because_. its easier to clone a sheep than other animals the scientists were determined and worked hard with patienceC. the scientists were rewarded and got lots of moneyD. many other attempts to clone mammals

5、failed4. Which of the following is not an advantage of cloning?Cloning can be used for medical purposes. Large quantities of food can be produced by cloning.Cloning can help keep animals from becoming extinct.Famous persons who have passed away can be cloned.Reading II Detail reading ( 8ms )Read the

6、 text again and find out the problems of cloningRead the text again and find out the advantages of cloningReading III Intensive reading (7ms )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 blemstwo majoreffectforbidden Press conference about cloning(關(guān)于克隆的記者款待會)Practice activity ( 8ms )Some students will act as biologists Other students will act as reporters.Repor