Detritus food chain begins with.....

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.

Which one of the following components of an ecosystem comes from outside?

The driving force of an ecosystem is

The transfer of energy from one trophic level to another occurs according to the second law of thermodynamics. What is the average efficiency of energy transfer from herbivores to carnivores (in $\%$)?

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 $\%$)