The greening of polar bears in zoos.
D000818:Animals; D000836:Animals, Zoo / Q000382:microbiology*; D002335:Carnivora / Q000382:microbiology*; D000458:Cyanobacteria / Q000302:isolation & purification / Q000648:ultrastructure; D006197:Hair / Q000382:microbiology* / Q000648:ultrastructure; D001503:Ursidae / Q000382:microbiology*