Biology: Concepts and Investigations 2nd Edition by Mariëlle Hoefnagels

Exercise 24

One spring, a dust storm blankets the usually green garden of the Fraggles in gray. The green Fraggles therefore become visible to the Gorgs, who tend the gardens and try to kill the Fraggles to protect their crops. The gray Fraggles, however, blend easily into the dusty background. How might this event affect microevolution in the Fraggles? What mode of natural selection does this represent?