Which of the following habitats is most unsuitable for primary productivity
Meadow
Forested river bank
Cave
Pond
Snake generally belongs to
Identify the likely organisms $(1), (2), (3)$ and $(4)$ in the food web shown below.
Total energy fixed by an ecosystem is called
Which of the following has the greatest amount of energy
The number of individuals of a species in a particular ecosystem at a given time remains constant due to