7. At times, catastrophic events on the earth have caused groups of organisms to be separated from each other. When the organisms
are separated so that they can no longer mate and produce
offspring, new species can slowly begin to evolve. This
geographical isolation as a barrier for groups of organisms may
lead to which of the following types of evolution?

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

the answer is cell division : )