Question

Decomposition is an ___ dependent process.

• A. Oxygen
• B. Nitrogen
• C. Carbon dioxide
• D. None of the above

Answer 1

The correct option is A Oxygen

Decomposition is also an oxygen-dependent process. In the presence of oxygen, complex carbon compounds are oxidized to produce carbon dioxide. In this sense, decomposition is essentially equivalent to respiration. If oxygen is absent or in scarce supply, specialized bacteria decompose organic matter anaerobically. Anaerobic decomposition involves more chemical steps and is slower than aerobic. Thus the presence of oxygen or aerobic conditions is a major factor affecting the rate of decomposition.