Question

The given diagram shows the pyramid of energy at each trophic level. Choose the correct statement for the energy flow in the given pyramid.

• A. Energy is passed up the pyramid with the least energy at the top.
• B. Energy is passed up the pyramid with the most energy at the top.
• C. Energy is passed down the pyramid with the most energy at the top.
• D. Energy is passed down the pyramid with the most energy at the bottom.
• E. Energy is a constant in the pyramid.

Answer 1

The correct option is A Energy is passed up the pyramid with the least energy at the top.

A pyramid of energy indicates the energy content at each trophic level. Since producers are the source of energy for the whole ecosystem, energy flow always occurs from the base of pyramid towards the top. With each trophic level, only 10% energy is transferred and 90% is lost as heat in respiration. This makes producers cotain maximum energy and top consumers to have the least amount of energy. Thus, the correct answer is A.