What do ecologists call the transfer of energy that begins with the sun and passes from one organism to the next in a food chain?
A food web
A top consumer
Energy flow
A pyramid of number
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.
Trophic levels are formed by
The trophic level of lion in a forest ecosystem is
In a lake, phytoplankton grow abundant in
If a single plant species is removed from a food web, then most likely