Which of the following is NOT a reason that biofilms are uccessful? Water channels circulate nutrients and wastes through the biofilm. Polysaccharide coats protect the biofilm from toxic chemicals. The presence of different species increases the range of substances a biofilm can use and produce. Microcolonies are efficient at trapping wastes inside the biofilm, where they are dissolved. Various species in the biofilm can specialize on different "tasks.".