Question

Which of the following is true of ecological pyramids

• A. Pyramids built upon biomass of organisms at each level eliminate size as a factor in the organisms
• B. Energy gains between trophic levels occur based upon biomass conversion
• C. Limited number of trophic levels man ecological pyramid are due to increasing complexity and size of organisms at each greater trophic level
• D. None of the above

Answer 1

The correct option is A Pyramids built upon biomass of organisms at each level eliminate size as a factor in the organisms

An ecological pyramid is a graphical representation designed to show the biomass or bio productivity at each trophic level in a given ecosystem. Biomass pyramids show how much biomass is present in the organisms at each trophic level, while productivity pyramids show the procreation or turnover in biomass. A "pyramid of biomass" shows the relationship between biomass and trophic level by quantifying the biomass present at each trophic level of an energy community at a particular time irrespective of the size of the organisms. It is a graphical representation of biomass (total amount of living or organic matter in an ecosystem) present in unit area in different trophic levels.

So the correct option is 'pyramids built upon biomass of organisms at each level eliminate size as a factor in the organisms'.