Doctors trying to identify the nature of the immune response to a newly identified pathogen note that every time they isolate the antigen that the immune system is responding to, it is bound to the surface of a cell. This means that the component(s) of the immune system involved could be .

You're in the breakroom at work when you see a coworker posting a cartoon on the bulletin board. you read it as you pass, and it's a joke about women breastfeeding in public. a male walks up, looks at it and starts laughing. other make employees walk up, and one takes it down saying he is going to make copies for everyone. what do you do?