1. The geographical isolation and special edaphic conditions helped to preserve it too. 2. Due to its geographical isolation , economic progress in the state is hindered. 3. Brinton, E . ( 1959 ) Geographical isolation in the pelagic environment. 4. Geographical isolation causes a divergence of a species into different morphs.5. These events resulted in Yugoslavia's geographical isolation from potential Allied support. 6. Perceived disadvantages comprise geographical isolation from important activities in adjacent communities. 7. Geographical isolation and a poorly developed infrastructure are major impediments to long-term growth.8. First, federate our colonies and prevent geographical isolation turning the Anglo-Saxon race against itself. 9. Sympatric speciation is defined as the evolution of a new species without geographical isolation . 10. The mountainous terrain and geographical isolation of the region have added to this concealment.