When a new species form by geographic isolation, it is called geographical speciation or allopatric speciation. Geographical isolation is a physical separation which prevents gene flow between distinct populations (in this example, three land masses formed after one big land mass broke down). Three populations of the same species on three land masses will eventually diverge from the ancestral adansonia species. The members of the populations, which once belonged to the same species, will no longer be able to mate and produce offspring. Eventually, the formation of new species will occur.
