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                                    31. Ecological pyramid are also known as-(A) Odumian Pyramids(B) Triangular Pyramids(C) Eltonian Pyramids(D) Al Jahiz Pyramids | 
                            
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Answer»  Answer: c Explanation: An ecological pyramid (also trophic pyramid, Eltonian pyramid, ENERGY pyramid, or sometimes food pyramid) is a graphical representation designed to show the BIOMASS or bioproductivity at each trophic level in a GIVEN ECOSYSTEM.  | 
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