Rivers are the primary body of water found in tropical rainforests. Many rainforests feature one large river that feeds the entire ecosystem and many smaller rivers that drain into the major water body, such as the Amazon river and its many tributaries.
1 Cook in the oven for 30 minutes at 325 degrees F (165 degrees C). 2  Reduce the heat to 300 degrees F (150 degrees C), and cook for 1 1/2 hours. 3  Remove roast to a platter to rest for 10 to 15 minutes. Return meat to pan, place remaining bay leaf on top of meat, and cover. 2  Cook in the oven for 30 minutes at 325 degrees F (165 degrees C). 3  Reduce the heat to 300 degrees F (150 degrees C), and cook for 1 1/2 hours.
A pot roast is most often cooked at a lower temperature so that the cartilage in the meat will break down and allow the meat to become tender. You can braise a pot roast in the oven, on the stove or in a slow cooker.lace the roast in a roasting pan, fat side up. Add 1/2 to 1 cup of water to the pan. Cover the roaster with a lid or aluminum foil and cook until the meat is fork tender. For a 4-pound roast, this will take approximately two hours in the oven. Larger roasts over 6 pounds can take three to four hours to fully cook.