Question

differentiate between Food Chain and Food web. Construct an aquatic food chain showing four trophic levels

Answer 1

In food web, producers are eaten by many different consumers, and most consumers onward are eaten by more than one predator. ... Most organisms are part of several food chains. A food webstarts with the producers in ecosystem and then branches off into interconnected food chainsthat show who eats whom in ecosystem.

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Answer 2

 a foofd chain is a chain in which a  small animal is eaten by a large animal 
a big food chain is call food  web