Question

The major function of bacteria and fungi in an ecosystem is _____

• A. Absorption of inorganic nutrients
• B. Degradation of complex inorganic nutrients
• C. Decomposing dead organic matter and returning energy to the atmosphere
• D. Fixation of nitrogen and phosphorus.

Answer 1

The correct option is C

Decomposing dead organic matter and returning energy to the atmosphere

Decomposers [Bacteria and fungi] are the waste managers of any ecosystem. They are the final link in a food web breaking down dead organic matter from producers and consumers and ultimately returning energy to the atmosphere in respiration and inorganic molecules back to the soil during decomposition.