The figure shows the biomagnification of DDT | vedclass

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(A) Biomagnification refers to the increase in concentration of toxic substances at successive trophic levels in a food chain.In the given aquatic foo

Vedclass · Accepted Answer

$2\,ppm, 0.5\,ppm, 0.04\,ppm$

Vedclass · Answer

(A) Biomagnification refers to the increase in concentration of toxic substances at successive trophic levels in a food chain.In the given aquatic food chain,the concentration of $DDT$ increases as we move from lower to higher trophic levels.The levels are: Water $(0.003\,ppm)$ $\rightarrow$ Zooplankton $(0.04\,ppm)$ $\rightarrow$ Small fish $(0.5\,ppm)$ $\rightarrow$ Large fish $(2\,ppm)$ $\rightarrow$ Fish-eating birds $(25\,ppm)$.Assuming $P$,$Q$,and $R$ represent the concentrations in large fish,small fish,and zooplankton respectively (or a similar sequence based on the options),we look for the sequence $2\,ppm, 0.5\,ppm, 0.04\,ppm$.Therefore,option $A$ is the correct representation of the concentration values for these trophic levels.

The figure shows the biomagnification of $DDT$ in an aquatic food chain. What could be the concentration of $DDT$ in $P$,$Q$,and $R$ respectively?

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