The loop of henle is a countercurrent exchanger because it creates a concentration gradient rather than simply maintaining it. false true

true

The loop of Henle is adequately long enough to descend into the medulla before looping back into the cortex. It helps to establish a concentration gradient based on the permeability of different parts of the loop. 

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.

Ibelieve the answer is a-broad because that is a leafed plant.