Researchers have been able to teach a rat that it has to push the lever five times to get food. every time the lever is pushed five times the rat will get a piece of food, but if it is pushed less than five times it will not get the food. this type of reinforcement scheduled is called what?

4) what articles do you think a soldier would have in his “old kit bag”?

Situation #1: imagine that you are a free black male living in columbus, oh in 1863. you have seen the recruiting poster and have been thinking a lot about whether or not to enlist in the union army. write a one-page letter (double spaced) to your mother telling her of the decision you have made about enlisting (or not enlisting). be sure to explain the reasons that caused you to make the decision.

What nitrogenous bases are found in rna