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Class 12BiologyEcosystemDecomposition
Medium

Select the incorrect statement regarding humus.

  • A
    It is a dark-colored amorphous substance formed by humification.
  • B
    It is highly resistant to microbial action.
  • C
    It acts as a reservoir of nutrients.
  • D
    Humus cannot be decomposed.
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Class 12 Questions

Class 12

Biology Questions

Chapter

Ecosystem

Subtopic

Decomposition

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$A$: Detritivores and decomposers hold up a part of nutrients contained in detritus.
$R$: Immobilised nutrients cannot be available for solubilisation after the death of saprotrophs.

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Which of the following processes is correctly described during decomposition?

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Match List-$I$ with List-$II$ :
List-$I$List-$II$
$A$. Decomposition$I$. Accumulation of dark coloured amorphous colloidal substance
$B$. Detritus$II$. Release of inorganic nutrients by the activity of microbes in soil
$C$. Mineralisation$III$. Breaking down of complex organic matter into inorganic substances
$D$. Humification$IV$. Dead remains of plants and animals including fecal matter

Choose the correct answer from the options given below :

MediumNEET 2026
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