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高中英语 Unit 2 Cloning reading课件1 新人教版选修8


Write the letter T if the statement is true. Write F if it is false. F 1. Cloning means making a copy of an animal. T 2. Gardeners can make a lot of money by cloning plants. F 3. Cloning

animals is as complicated as cloning plants. T 4. Dolly the sheep was the first successful clone of a mammal. 5. Natural clones happen in animals as T well as in plants. 6 Clone can be from both natural clone and man-made clone . T 7 Only strawberries and cactus(仙人 掌) are natural clones . F Discuss in groups: 1. 2. 3. 4. 5. What is a clone? When does a clone happen in plants? When does a clone happen in animals? What are the two major uses? Which is more difficult, animal cloning or plant cloning? 6. Why did Dolly the sheep succeed? Ne discusstion Main idea of each paragraph. Para 1. Cloning is a way of making an exact copy of another animal and plant. 1. What is a clone? Ba 2. When does a clone happen? natural clone in plants: It happens in plants when gardeners take cuttings from growing plants to make new ones. Ba 2. When does a clone happen? natural clone in plants: It happens in plants when gardeners take cuttings from growing plants to make new ones. in animals: Twins are produced from the same original egg and are identical in sex and appearance. be identical in sex and appearance Other examples: 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 仙人掌每块落地就生根 富贵竹插枝即活 (吊兰) natural clone in plants in animals nucleus Dolly是世界上第一例用 man-made clone 体细胞─乳腺上皮细胞, 通过细胞核移植技

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