Greater primary productivity depends upon
Rain (humidity)
Availability of nutrients
Both $(a)$ and $(b)$
None of these
Biological equilibrium is an equilibrium among the
A food web
Consider the following statements about food chain
$I.$ The transfer of energy from producers to top consumers through a series of organisms is called food chain
$II.$ A food chain is always straight and proceeds in a progressive straight line
$III.$ In a food chain, there is unidirectional flow of energy from sun to producers and subsequently to series of different types of consumers
Which of the statements given above are correct?
The food chain which begin with dead organic matter is called