Question

Which of the following ecological pyramids cannot be inverted?

• A. Pyramid of biomass
• B. Pyramid of energy
• C. Pyramid of number
• D. None of these

Answer 1

The correct option is B Pyramid of energy

As energy is wasted at each trophic level, energy pyramids are always vertical; an ecosystem without sufficient primary productivity cannot support itself. Ecological pyramids of all kinds are valuable for describing ecosystem structure. Energy is always more at a lower trophic level than at a higher level.
The 10 percent law of energy transfer states that only $10\%$ of the energy from the lower trophic level is transferred to each trophic level, and the quantity of energy transferred decreases with each trophic level. Organisms at each trophic level rely on those at the lower trophic level for their energy needs.