Home Biology Ecosystem Assertion & Reason Assertion: Decomposition in lignin-rich detr…
Biology Ecosystem Assertion & Reason Single Correct MCQ
Published on: August 13, 2026

Assertion: Decomposition in lignin-rich detritus occurs very fast.

Reason: Decomposition rate is faster in low temperature.

A
Both Assertion and Reason are true and Reason is correct explanation of Assertion.
B
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
C
Assertion is true, but Reason is false.
D
Assertion is false, but Reason is true.

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Text Solution

Verified by Experts
The correct answer is:
D

The assertion is false because lignin is a complex polymer that is very difficult for microbes to break down, making decomposition very slow.

The reason is false because low temperatures inhibit microbial activity, which significantly slows down the rate of decomposition.

For decomposition to be fast, the detritus should be nitrogen-rich and the environment should be warm and moist.

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