A) Biomass in a forest
B) Energy in a grassland
C) Number in a pond
D) Biomass in pond ecosystem
Correct Answer: D
Solution :
The pyramid shown here is an inverted pyramid. Pyramid of energy can never be inverted. Number of producers (i.e., phytoplanktons) in a pond are always more than the consumers thus, pyramid of number in a pond cannot be inverted. In a forest, biomass of producers (i.e., tree) is large, so pyramid of biomass is upright in this case also. Pyramid of biomass for pond ecosystem is inverted as biomass of a trophic level depends on reproductive potential and longevity of its members.
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