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人教2003课标版《Warming up、Pre-reading、Reading、Comprehending》精品PPT课件优质课下载
What is
Cloning?
copy
They can be cloned by _________ and _________.
themselves
humans
Natural clone
Man-made clone
Natural clone is one that occurs in _______ without human help.
Man-made clone is one that is produced through__________ intervention(介入) .
Clone
Can you tell the difference between natural clone and man-made clone?
nature
human
Look at these pictures and judge which one is natural clone and which one is man-made.
Quiz
Natural clone
Man-made clone
I‘m celebrity(名人) . Do you know my name?
Bracket plant 吊兰
Dolly the sheep
Dolly the sheep
She was cloned while the others were born __________.
In other words, Dolly was a ______ sheep.
cloned