Two groups of rats were trained to navigate a runway (CR) for food (US). One group earned a single food pellet, the other received three pellets. When both groups are shifted to a situation in which they earn the alternative reward (i. e., effects would you expect to observe and why?

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.

answer; social penetration theory;

answer; continuing debate about how to interpret the constitution;