Home Biology Ecosystem NCERT In which among the following conditions, dec…
Biology Ecosystem NCERT Single Correct MCQ
Published on: August 12, 2026

In which among the following conditions, decomposition rate would be very fast?

A
nitrogen – rich detritus, warm O 2 – rich environment
B
lignin – rich detritus, cold, O 2 – rich environment
C
chitin – rich detritus, cold, anaerobic environment
D
sugar – rich detritus, warm, anaerobic environment

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The correct answer is:
A

Decomposition is fastest when the detritus is rich in nitrogen and simple sugars which microbes can easily break down. Warm temperatures and high oxygen levels provide the ideal conditions for aerobic microbes to remain highly active. In contrast, substances like lignin or chitin and cold or anaerobic conditions significantly slow down the decay process.

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