Which pair represents extrinsic environmental factors influencing decomposition?

Which pair represents extrinsic environmental factors influencing decomposition?

• A. Air and moisture
• B. Age and gender
• C. Carbohydrates and proteins
• D. Bones and teeth

Answer: (A)

Extrinsic environmental factors are external conditions that influence how decomposition proceeds. Air provides oxygen, which supports aerobic microbes that rapidly break down tissues, while moisture level affects microbial activity and chemical reactions—too dry slows decay, while the right amount of moisture promotes it, and very wet conditions can shift processes toward anaerobic pathways. These external conditions shape the rate and pathway of decomposition. The other options describe internal characteristics or the materials being decomposed rather than external conditions: age and gender are inherent traits of the organism, carbohydrates and proteins are the substrates microbes act on, and bones and teeth are the hard tissues themselves rather than environmental factors.

Extrinsic environmental factors are external conditions that influence how decomposition proceeds. Air provides oxygen, which supports aerobic microbes that rapidly break down tissues, while moisture level affects microbial activity and chemical reactions—too dry slows decay, while the right amount of moisture promotes it, and very wet conditions can shift processes toward anaerobic pathways. These external conditions shape the rate and pathway of decomposition.

The other options describe internal characteristics or the materials being decomposed rather than external conditions: age and gender are inherent traits of the organism, carbohydrates and proteins are the substrates microbes act on, and bones and teeth are the hard tissues themselves rather than environmental factors.