Question

Which of the following statements regarding energy flow is/are false?
I. Detritus food chain begins with dead organic matter
II. In aquatic ecosystem, detritus food chain is the major conduit for energy flow
III. In terrestrial ecosystem a larger fraction of energy flows through grazing food chain
IV. Producers belong to the first trophic level of the food chain

• A. II and III only
• B. III and IV only
• C. I and IV only
• D. I and II only
• E. I, II and III only

Answer 1

The correct option is A II and III only

A food chain is of two types, grazing food chain and detritus food chain. Grazing food chain begins with producer. It is then followed by consumers and decomposer. Detritus food chain begins with dead organic matter. In terrestrial ecosystem, a larger fraction of energy flows through detritus food chain. In an aquatic ecosystem, a larger fraction of energy flows through grazing food chain.

Thus, the correct answer is 'II and III only.'