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.
Animals that eat ONLY PLANTS are called herbivores (or primary consumers). Animals that eat OTHER ANIMALS are called carnivores. carnivores that eat herbivores are called secondary consumers carnivores that eat other carnivores are called tertiary consumerse.g., killer whales in an ocean food web ...ood Chains & Food Webs. 1  Plants are called producers because they are able to use light energy from the Sun to produce food (sugar) from carbon dioxide and water. 2  The process by which plants make food is called photosynthesis.