The graph shows the results of a famous biological experiment. in the experiment, kettlewell believed that the peppered moth demonstrated how environmental pressures influence evolution. he studied two areas. birmingham was a rural wood, with natural conditions. dorset was an urban, industrial area. the moths use tree trunks to camouflage themselves against birds, which are their major predators. natural gene variations produce a light form of the peppered moth, and a dark form, meaning that they are not equally visible. all but one statement is supported by kettlewell's data. that is question options: dark moths had a survival disadvantage in industrial dorset. light moths had a survival disadvantage in industrial dorset. dark moths had a survival disadvantage in forested birmingham. light moths had a survival advantage in forested birmingham.