1. in an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. the fifty-first generation emerged with normal-length wings. this observation would tend to disprove the idea that evolution is based on. a) inheritance of natural variations. b) inheritance of acquired characteristics . c) natural selection. d). survival of the fittest 2. charles darwin called the ability of an organism to survive and reproduce in its specific environment. a)diversity. b)fitness. c) adaption. d) evolution