In which of the following is the concentratio | vedclass

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(B) The phenomenon of $DDT$ concentration increasing at each successive trophic level is known as $Biomagnification$.In an aquatic food chain,$DDT$ en

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Sea birds / Gulls

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(B) The phenomenon of $DDT$ concentration increasing at each successive trophic level is known as $Biomagnification$.In an aquatic food chain,$DDT$ enters the water and is absorbed by $Phytoplankton$ (producers).As these are consumed by higher trophic levels,the concentration of $DDT$ increases because it is fat-soluble and cannot be metabolized or excreted.Therefore,the highest concentration of $DDT$ is found in the top-level consumers,which in this list are the $Sea$ $birds$ $(Gulls)$.

Column-$I$	Column-$II$
$(a)$ Small fish	$(1) \;25 \;ppm$
$(b)$ Zooplankton	$(2) \;2 \;ppm$
$(c)$ Fish-eating birds	$(3) \;0.5 \;ppm$
$(d)$ Large fishes	$(4) \;0.04 \;ppm$

In which of the following is the concentration of $DDT$ highest?

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Match the following concentrations of $DDT$ in an aquatic food chain:

Column-$I$ Column-$II$

$(a)$ Small fish $(1) \;25 \;ppm$

$(b)$ Zooplankton $(2) \;2 \;ppm$

$(c)$ Fish-eating birds $(3) \;0.5 \;ppm$

$(d)$ Large fishes $(4) \;0.04 \;ppm$

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