. Many extinct species are dead, but their DNA can be ________ from samples and fossils in museums, even those up to 200,000 years old. 7. We can preserve species through the use of genetic engineering and reproductive _______. 8. Before cloning any animals, scientists must _______ that the animals can live their lives well in this world. 9. Many people believe that cloned mammoths might ______ problems to our ecosystems. 10. I’d like to know whether humans have _______ to clone other animals. Do we have moral obligations to do it?