Which of the following is correct sequence in food chain
Fallen leaves $→$ bacteria $→$ insect larvae $→$ birds
Phytoplankton $→$ zooplankton $→$ fish
Grasses $→$ fox $→$ rabbit
Grasses $→$ chameleon $→$ insects $→$ birds
The trophic level of S-bacteria and cyanobacteria is
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?
Which of the following are called key industry animals?
Energy enters in ecosystem through
The aquatic organism that can actively swim at will against the water current is