Limestone is a sedimentary rock that is composed primarily of calcite. It forms from both the chemical precipitation of calcium carbonate and the transformation of shell, coral, fecal and algal debris into calcite during diagenesis.
To calcu-late the PPF, suppose that Crusoe puts all 8 hours into gathering fruit, so that he gets 36 pounds. But there is no time left for fishing, so he gets 0 pounds of fish. If he takes an hour off from gathering fruit, he gets 35 pounds of fruit and has an hour in which to fishâso he gets 4 pounds of fish.The rest of the PPF is con-structed similarly. 2.ut there is no time left for fishing, so he gets 0 pounds of fish. If he takes an hour off from gathering fruit, he gets 35 pounds of fruit and has an hour in which to fishâso he gets 4 pounds of fish. The rest of the PPF is con-structed similarly. 2.
Some of their prey includes fish, mollusks, crustaceans, insects, birds, lizards, amphibians, rodents and carrion (carcasses). Piranhas are diurnal (most active during the day). Piranhas generally eat smaller fish. Larger fish and small mammals may be attacked if there is a school of piranhas. Foraging methods vary in the different life stages of Piranhas. During the day, smaller fish typically search for food whilst at dawn, late afternoon and early evening the larger fish search for food.