what is biological magnification?explain a food chan and a food web?

Asked by  | 17th Feb, 2014, 04:53: PM

Expert Answer:

Biomagnification or biological magnification, is the increase in concentration of a substance that occurs in a food chain.It is the concentration of a substance, such as DDT or mercury, in an organism exceeds the background concentration of the substance in its diet.
 
A food chain is a group of organisms that are interrelated.Each member of the group organism feeds on the chain below it and the group of organisms above, in turn feed on them.
 
A food web is a system of interconnected and interdependent food chains.
It can also be defined as a network of food relationships through which nutrients and energy are passed from one living organism to another.
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Answered by  | 18th Feb, 2014, 08:26: AM

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