The broad categories of aquatic biomass are primary producers and secondary producers.
Characteristics that are used to divide aquatic biomass into three zones include whether the water is fresh or salt and if the water moves. Fast moving and slow moving water are classified differently.
Bacterias, Eubacterias, and extremophiles.
Prokaryotic and eukaryotic cells.
butter
Three broad categories of economic indicators are: Total Output, Income, and Spending, Employment, Unemployment, and Wages, and Production and Business Activity.
Because of the relative longevity and reproductive capacity of predators vs. plankton
Classified and unclassified
people
butter
minor moderate major
butter
public and private