Organisms living in open sea are called
Planktons
Nektons
Pelagic
Benthos
A rat feeding upon potato tuber is
The number of individuals in each trophic level depends upon
Only a small amount of the energy stored in food is available to the next organism in a food chain because
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?
In a pond ecosystem, benthos means