There was this seminar conducted in our research center and it was a guest lecture on cloning... They spoke about the cloning being conducted on animals that are on the verge of extinction or are already extinct so that their numbers can increase... I posed this question to him and didn't get an answer so I was wondering if anyone could help me on this... If animals go extinct following the theory of natural selection and we try to bring them back through cloning, then will the species survive or go extinct again? and if it does survive, will it adversely affect the ecosystem where it is introduced through species richness?