Evolution is adaptation, or change, of organisms in response to environmental changes.. the theory of evolution states that similar organisms evolved from a common ancestor. Scientists hypothesize that marsupials like koalas and kangaroos, which are only native to Australia, evolved from the same ancestor as the marsupials known as opossums, which are native to north and South America. Does this theory of plate tectonics support the theory of evolution in this case? Explain your answer.