Detritus food chain begins with.....

The number of individuals in each trophic level depends upon

Assertion : $A$ network of food chains existing together in an ecosystem is known as food web.
Reason : An animal like kite cannot be a part of a food web.

Cybernetics is associated with

The number of trophic levels in a food chain is limited to $4$ or $5$ because

The transfer of energy from one trophic level to another follows the second law of thermodynamics. The efficiency of energy transfer from herbivores to carnivores is: (in $\%$)