Which one of the following is not used for th | vedclass

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(D) Ecological pyramids are graphical representations of the trophic structure and function at successive trophic levels.Ecological pyramids are gener

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Fresh weight

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(D) Ecological pyramids are graphical representations of the trophic structure and function at successive trophic levels.Ecological pyramids are generally of three types:$(i)$ Pyramid of number: Represents the number of organisms at each trophic level.$(ii)$ Pyramid of biomass: Represents the total dry weight of living organisms at each trophic level.$(iii)$ Pyramid of energy: Represents the rate of energy flow or productivity at successive trophic levels.Fresh weight is not used because it includes water content,which varies significantly and does not provide a reliable measure of the organic matter or energy available at a trophic level. Therefore,fresh weight is not used for the construction of ecological pyramids.

Which one of the following is not used for the construction of ecological pyramids?

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