How many levels are there in normal food chain?

How many trophic levels are there in a food chain ?

Why is the number of trophic levels limited in a food chain ?

Energy transfer from one trophic level to other , in a food chain , is

In how many trophic levels can humans function in a food chain ?

Depict diagrammatically a food web in any ecosystem. How many types of food chains are there in that food web?

Define a food chain. Design a terrestrial food chain of four trophic levels. If a pollutant enters at the producer level, the organisms of which trophic level will have the maximum concentration of the pollutant in their bodies ? What is this phenomenon called ?

What percentage of energy available at the producer level is transferred at successive trophic levels in a food chain ?