Answer
Advantages: the ease and control that comes with any model system
Disadvantages: not all behaviors exist in easy-to-use model systems; some behaviors could be learned in the model system but innate in other animals or vice-versa.
To determine the applicability of results: test in non-model systems to see if the results are the same.
Work Step by Step
Model systems are always chosen for ease-of-use, but that usually implies that they are simpler than other organisms, making the results of questionable general applicability. The thing to do is to check the results with non-model systems, which should be done no matter what part of biology is being examined using a model system.
