Unit2Learning aims: * To have a good understanding of the reading passage; * To be able to discuss some of the issues associated with cloning.Dolly the sheep Dolly was cloned while the others were born naturally. How does Dolly differ from other sheep?Natural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that is produced through human intervention( 介入) .Look at the following pictures and discuss which ones are natural clones and which ones are ma
