In an ecosystem in abiotic components which of the following occur
Flow of energy
Cycling of materials
Consumers
Flow of energy and cycling of materials
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.
Which of the following food chain shows spindle shaped pyramid of number?
The second order consumer in a food chain is
Which of the following groups is absolutely essential functional component of the ecosystem?
Give an account of energy flow in an ecosystem