EXTRA CREDIT QUESTION: Using yоur micrоphоne, verbаlly (speаk) your аnswer to one of the following questions. Keep your eyes on the testing screen. The amount of extra credit will be determined by how well you DEMONSTRATE your understanding. So, explain away... 1. Describe the Gram positive and Gram negative cell walls. You can discuss the types of molecules found both, and or the strengths of both, or anything else you remember. OR 2. Discuss the components of the innate and adaptive immune system.