Q. Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Why or why not?
No. geographical isolation will not be a major factor in the speciation of a self-pollinating plant species because new gene variants will not be introduced in the population and there will be no evolution of a new species. On the other hand, in cross pollinated species, when geographical isolation is there, accumulation of variations in traits will take place.