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高二英语下学期Reading2

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英语 学期 Reading2
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Unit 2 Cloning the important events in cloning history In 5000B C 谷物选种 Human Beings began to choose the best seeds from some kinds of crops That was the beginning of controlling life according to human s will In 1952 Cloning tadpole 克隆蝌蚪 The American scientists created a copy of tadpole by means of using a tadpole cell This tiny tadpole has become the first kind of cloning animal In 1978 The first case of tube infant 试管婴儿 appeared A British doctor used the sperm 精液 of a man and fertilized 受精 it in a test tube 试管 Then transplanted 移植 the embryo 胚胎 into the womb 子宫 of a healthy mother The first tube infant called Louis appeared In 1996 the famous sheep Dolley was cloned successfully Dolley and the Father of Dolley Ianwilmut 伊恩 威尔 姆 In 1998 A series of things were cloned The scientists in Hawaii University cloned over 50 mice Some private institutions 协会 successfully cloned little oxen In 2002 the scientists of A M University in USA has bred the first cloned cat in the world Nowadays Cloned dog mouse rabbit goat ox pig appeared China become the seventh country that has the ability to clone pigs China has succeeded in using embryonic 胚胎的 cell to clone many animals the important events in cloning history Warming up 4ms Answer the following questions 1 Do you like dinosaurs Where have you seen them Can you see them in our real life Why 2 Do you think it is possible to clone dinosaurs If yes do you think that s good for human beings Why Students give their own answers Reading I scanning 5ms Read the text then tell the following sentences are true or false Students can discuss in pairs 1 Scientists are still experimenting with cloning mammals because they think it can make money 2 The animals that have disappeared from the earth like dinosaurs can be brought back to life through cloning 3 If we can clone any extinct animals we should let them live in a zoo F F F Reading II Detail reading 6ms Read the text then answer the following questions Students can discuss in pairs 1 Why should t you clone an extinct animal unless there is enough diversity in the group 2 Why is it wrong to clone an extinct animal if it would have to live in a zoo 3 Why can t you clone the DNA of animals that have been extinct longer than 10 000 years 1 Why should t you clone an extinct animal unless there is enough diversity in the group 2 There will not be enough genetic variation in the group to be able to resist new illnesses 2 Why is it wrong to clone an extinct animal if it would have to live in a zoo It is not a good idea to clone an animal that would have to live in a zoo because it is not a suitable habitat to develop and increase its numbers The zoo is not a natural environment for a wild animal 3 Why can t you clone the DNA of animals that have been extinct longer than 10 000 years The DNA of animals more than 10 000 years old is not suitable for cloning for it can t survive so long Reading III Argument 10ms 1 Read the passage again and have a argument according to the requirement of Ex 2 on Page 16 2 Students work in groups when discussing the head of each group should write down the opinions of all the members 3 Ask some volunteers to show their opinions
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