Rank hemoglobin molecules with the described conditions from most likely to bind oxygen molecules to most likely to release oxygen molecules. (For help approaching this problem, open Hint 1.)

The answer to the question is climax community. Once the vegetation in an area has reached a steady state, it can sustain a population of animals, creating a climax community, a collection of organisms that are sustainable and are best adapted to the average environment. In the case here, a desert composed of cactus and brush as well as birds, snakes, lizards, and rodents would definitely be considered a climax community to sustain all those species.