Trees $\rightarrow$ Birds $\rightarrow$ Lice $\rightarrow$ Bacteria. Thus food chain is
Predatory
Grazing
Detritus
Parasitic
Snake generally belongs to
The mass of living material at a trophic level at a particular time is called
Which of the following is source of energy to an ecosystem
Which of the following trophic levels are occupied by sparrow?
The transfer of energy from organism to organism in a natural community establishes