Home Biology Ecosystem All Topic Question For Revision Test Which one of the following statement is corr…
Biology Ecosystem All Topic Question For Revision Test Single Correct MCQ
Published on: August 13, 2026

Which one of the following statement is correct about decomposition?

A
Decomposition rate is slower if detritus is rich in lignin and chitin, and quicker if detritus is rich in nitrogen and water – soluble substances like sugars.
B
Decomposition rate is slower if detritus is rich in nitrogen and water – soluble substances like sugar, and quicker if detritus is rich in lignin and chitin.
C
Decomposition rate is slower if detritus is rich in cellulose, and quicker if detritus is rich in phosphorus.
D
Decomposition rate is quicker if detritus is rich in lignin, and lower if detritus is rich in sulphur.

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The correct answer is:
A

Decomposition is slow when detritus contains resistant substances like lignin and chitin, and fast when it contains easily degradable materials like nitrogen-rich compounds, sugars, and water-soluble substances.

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