Succulent plants, like cactus {plural = 'cacti'), have their centers of diversity in deserts. Which statement/s about this topic isIare true and argue for evolution? Cacti radiated before the continents broke up (in the days of Pangea), so we see various sub-groups of the cactus family on various continents. Succulent plants are all viewed as closely related to one another and have inherited the state of being succulent from their common ancestor. Almost all cactus species are native to the New World, whereas other groups have succulent species in the Old World. Some species of cactus from the Americas have been introduced to other desert places like Australia. but they need to be constantly taken care of because they cannot survive on their own in those climates. Closely related cacti are in South America. Africa, and Australia, and only distantly related cacti are native to the Northern Hemisphere