Which of the following statements about ecological pyramids is true?
A. A pyramid of organism numbers will always have a large base and a small top.
B. The limited number of trophic levels in an ecological pyramid is due to increasing complexity and size of organisms at each greater trophic level.
C. Pyramids built upon the biomass of organisms at each level eliminate size as a factor.
D. Energy gains between trophic levels occur based upon biomass conversion.
E. None of the choices are true.
Answer: C
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