Identify the combination of given steps involved in the process of decomposition.
A. Fragmentation
B. Stratification
C. Humification
D. Catabolism
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A, C and D only
Decomposition is the breakdown of dead plant and animal remains (detritus) into simple inorganic substances. Its steps are fragmentation, leaching, catabolism, humification and mineralisation.
(A) Fragmentation — Correct. Detritivores, such as earthworms, break the detritus into small pieces. This is the first step.
(B) Stratification — Incorrect. This is not a step of decomposition. It is the vertical arrangement of different species at different levels in a community.
(C) Humification — Correct. Humus, a dark, nutrient-rich substance that is resistant to further breakdown, builds up in the soil.
(D) Catabolism — Correct. Bacterial and fungal enzymes break the detritus down into simpler substances.
NCERT Extract:
Decomposition – …
