C:N ratio of microorganism:
Correct answer: D. N0ne of the above
- A. 4:1-8:1
- B. 10:1-15:1
- C. 15:1-20:1
- D. N0ne of the above
Explanation
Microbial biomass generally has a C:N ratio of roughly 5:1 to 15:1, depending on the microbial group and conditions. Since none of the listed ranges represents this commonly cited range, “none of the above” is the best option.
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