Upon observing a golden eagle flying overhead, a prairie dog on guard duty gives a warning call to other members of the prairie dog community that are foraging. what form of animal behavior is this?

The form of animal behavior that this prairie dog on guard duty exhibits is altruistic behavior.
This means that the dog isn't only thinking about itself, but rather about the others as well. Since it escaped danger, it alarmed other dogs as well, so that they could also be safe and not injured by the golden eagle. It seems that not only humans, but also animals are capable of showing such a behavior. 

Uh...selective permeability? Some things can pass through the membrane whilst other things can't diffuse freely and passively (like larger, polar molecules-like that bug). Maybe lol.