Most mice living on the mainland of florida are brown, but the mice that live on the sand dunes of the barrier islands have white fur. it is intuitive that the light color of beach-dwelling mice is an adaptation for blending into their environment−and thus evading predators. how can this hypothesis be tested?

A trait that improves the fitness of its bearer, compared with individuals without the trait.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.