Why do organisms take food

Apart of an ecosystem that can restrict the growth of a population is referred to as

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

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.