All of the following statements can be cited as evidence for evolution. i. the embryos of all vertebrates share many common features, such as the presence of gills at some stage in their development. ii. before human interference, australia had many diverse marsupial species but none of the advanced placental mammals found on other continents. iii. the dna sequences of related organisms are more similar than those of unrelated organisms. iv. the forelimbs of cats, dolphins, and bats have the same skeletal elements. which of these pieces of evidence is provided by biogeographical data?