An ecosystem must have continuous external source of
Food
Minerals
Energy
All of the above
Primary producer of an ecosystem is
Energy storage at consumer level is called
Which of the following statement is not correct about energy flow in an ecosystem?
In an ecosystem, the population of
How many sentence are correct?
$(1)$ The trophic levels in $GFC$ are unlimited
$(2)$ Organisms at each trophic level depend on those at the higher trophic level for their energy demands.
$(3)$ Plants capture only $2 -10$ percent of $PAR$.
$(4)$ All organisms are dependent for their food on producers, either directly or indirectly.