On an island, a scientists observes that the native lizards are different from similar species that live on the nearby mainland. the scientist concludes that the common ancestors of the lizard began developing into different species when the island separated from the mainland. which evidence would best support the scientist's conclusion? a) the appearance of a mainland lizard living on the island
b) geologic evidence that the island arose from volcanic eruption
c) the appearance of an island lizard living on the mainland
d) fossils of the same lizard species on both the island and mainland