Over the last thousand years, plant species native to islands have gone extinct at a much faster rate than have those native to mainland regions  Biologists believe that this is because island plants have not adapted the defenses against being eaten by large land mammals that mainland plants have  Ordinarily, populations of large land mammals are not established on islands until after the island is colonized by humans
Which one of the following
Many plant species that are not native to islands have become very well established on islands throughout the world.