Mass of living matter at a trophic level in an area at any time is called
standing crop
detritus
humus
standing state.
The salinity of the oceans is
Plants capture only....... percent of the $PAR.$
Simplified model of phosphorus cycling in a terrestrial ecosystem is given below. Identify $A, B, C$ and $D$
Maximum biomass and variable organism are found in
Plankton, nekton and benthos are not the components of