Marsupial mammals give birth to young that complete their development in a pouch on the mother's abdomen. All the native mammals of Australia are marsupials, while these types of mammals are absent or uncommon on other continents. This observation is an example of a.developmental evidence for evolution; b. biogeogra­phic evidence for evolution; c. genetic evidence for evolution; d. fossil evidence for evolution; e. not useful evidence for evolution

Video transcript

Hello everyone here we have a question saying most of the mammals in Australia are marsupials carry their young in their pouch while most mammals elsewhere in the world are placental. What could explain this difference? A because Australia was isolated by water for millions of years, which made the mammals in the continent evolved independently. This is correct be because Australia is a huge continent, this would not cause most of the mammals to be marsupials. See because Australia has an entirely different season. This also would not cause most of the mammals to be marsupials. D because these mammals in Australia are more adaptive than the rest of the mammals in the world. This is not true. Australia was isolated by water for millions of years, which made the mammals and the content evolved independently and this caused genetic flow to other mammals being restricted. And that's why the mammals in Australia had evolved independently. So our answer here is a because Australia was isolated by water for millions of years, which made the mammals in the continent evolve independently. Thank you for watching. Bye!