Allopatric speciation is a type of speciation that is caused due to geographical isolation that results in the separation of the population of the same species that once inhabited the same geographical area.
Due to this geographic separation, the species become so isolated that no more gene flow occurs between the two species and therefore, with time new species get formed.
The various geographic changes that can contribute to the separation of the two species can be - formation of mountains, islands, water bodies, glaciers, etc.
The populations that get separated due to the geographic barriers are subjected to different selective pressures and hence, speciation occurs.
Um. The drawbacks to the extensive use of solar energy? well all the other statements about it are false so the correct answer would have to be B. Necessary equipment and installation are expensive
The river dolphin is a group of aquatic animals that is specially adapted to the fresh water and are relatively smaller compared to the other dolphins.
They have evolved to survive in shallow waters and strong-river currents. These dolphins are not very widely disturbed and are found in certain deltas and rivers.
