ay versus black) are genetic. After many moth generations, almost all the moths in industrial areas were black. The black moths became a subspecies of the Biston betularia. Black coloration is an adaptation to an environment with black tree trunks; that is, it has evolved through natural selection because black individuals have higher fitness in forests with black tree trunks than do gray moths.
             Darwin did many experiments to prove the evolution in the moths. He tested the chemicals in the soot to make sure that they were not causing a mutation in the moths. The chemical ratio was foung to be higher than normal. Scientists concluded that it was mutation.
             He then put a spot on the underside of the moth so that he could keep an acurate recorde of the cencus of moths that had evolved and were now black. He placed the dot of paint on the underside so that in the rain the paint would not come off. Another reason for the placement of the paint was so if the moth was attacted then the paint would not scratch off. The paint was a good method of distinguising the moths. It is like tagging birds orother animals. If the moths had not been recaptured then Darwin would
             not have know how many moths returned alive. Since it was a possibility that the paint could come off, his count was not completely accurate.
             Another experiment was preformed, in this Darwin put light moths on a dark tree. This showed that the chief predator of the moth was the birds. When both coloration of moths were placed on the tree trunk it showed that the light mothes were most likely to be prayed upon. In a poluted forest the darkk moth is most apt to survive and flurish. In the unpoluted forest where the trees were still covered with lichen the light moths survive better. I feel that it is not likely that the dark colored moths existed before the Indidustrial Revolution. If they had been around they would have quickly died out because the trees were not covered in so...