课件26张PPT。Welcome to the unitUnit 3 Science versus natureVSWhy “versus” is used here?Do you think there is conflict between science and nature?
What might the conflict be?
What kinds of topics might be discussed in this unit?The advanced technique in genetics(遗传学) with which scientists can create
or copy things with the same DNA is called -?cloneScience is developing so fast that it is beyond our imagination. Cloning is one of the more advanced technologies.Scientific definitionCloning is the creation of cells or whole
animals by using DNA(脱氧核糖核酸)
from a single "parent", bypassing
(绕道而行) the normal reproductive
(生殖) process. The clone has the same
DNA to the “parent”.Talk about the pictures in the book.Dolly and its creatorWhat do you know about Dolly?the world’s first cloned mammal
created by Scottish scientists in 1996
died in 2003 because of lung disease
many countries have banned human
cloning since Dolly’s birthLook at the books, and talk about the rest of the pictures.Let's enjoy a film!BrainstormingIf you are a scientist, what do you want to clone? Why? More contributions to humanEinsteinMore world championsChina, a more harmonious communityFun picturesIf cloning goes wrong, what will happen?A dog or an eagle?A duck or a crocodile?A cock or a dog?A lion or a kangaroo?A frog or a crocodile?A tortoise or a bear?A bird or a dog?A dog or a man?DiscussionDo you think governments should pass laws to prohibit human cloning? Why or why not?They shouldn’t, for…reasons:Cloning can help cure many
diseases and save a lot of
people lives.
2. ……
3. ……Party AThey should, for…reasons:Cloning can lead to
ethical(伦理) problems.
2. ……
3. …… Party BHomework: Write an article Today our class had a discussion about whether the governments should pass laws to prohibit human cloning.
Some students think that the governments shouldn’t, for…
However, some other students think
it necessary to prohibit…, for…
In my opinion, …
