What is special about water and density

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

Were you able to observe the nucleolus in any of the cells if so which ones

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