Coning is a way of (making) an exact copy of another animal or plant. Cloning has two major uses.
Firstly, garderners us ( it ) to produce commercial quantities of plants. Secondly, it is (valuable) for research on new plant species and for meidcal research on animals. Cloning is a difficut taks ( to under-take). In 1996, scientists' efforts paid (off) - with a breakthrough, Dolly the sheep. But Dolly altogether (lived) six and a half yers and this disturbed the scientists. Dolly's appearance also raised a storm of (objection) and had a great impact (on) the media and publie imagination. The argument (for) cloning is still on. (Some) governments became nervous and more conservative.