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