Ameasure of the amount of output produced by a given amount of inputs in a specific period of time is the definition of a) allocation. b) productivity. c) opportunity costs. d) equilibrium price.

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present