0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Which one of the following processes during decomposition is correctly described ?

  1. Fragmentation - Carried out by organisms such as earthworm
  2. Catabolism - Last step in the decomposition under fully anaerobic condition
  3. Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate
  4. Leeching - Water soluble inorganic nutrients rise to the top layers of soil

A
Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate
B
Fragmentation - Carried out by organisms such as earthworm
C
Catabolism - Last step in the decomposition under fully anaerobic condition
D
Leeching - Water soluble inorganic nutrients rise to the top layers of soil
Solution
Verified by Toppr

The correct option is A Fragmentation - Carried out by organisms such as earthworm
1. Detritivores (e.g., earthworm) break down detritus into smaller particles through the process of fragmentation.
2. Humification leads to accumulation of a dark coloured amorphous substance called humus that is highly resistant to microbial action and undergoes decomposition at an extremely slow rate.
3. Catabolism is the degradation of detritus into
simpler inorganic substances in aerobic conditions.
4. By the process of leaching, water-soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts.
So, the correct option is 'Fragmentation - Carried out by organisms such as earthworm'.

Was this answer helpful?
0
Similar Questions
Q1
Match column A with column B and choose the correct option.
Column A Column B
I. Humification a. Percolation of water soluble inorganic nutrients into the soil
II. Leaching b. Organic matter formed at consumer level
III. Secondary productivity c. Process of decomposition of detritus to form a nutrient-rich dark coloured, amorphous substance

View Solution
Q2
The substance which undergoes decomposition by the microbial action is called a:
View Solution
Q3
Which one of the following processes during decomposition is correctly described ?
View Solution
Q4
Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements [(i), (ii) and (iii) regarding these and select the correct option.
(i) Detritivores(e.g., earthworm) breakdown detritus into smaller particles.
(ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts.
(iii) Decomposes(e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.
View Solution
Q5
'X' is an organic substance obtained from the decomposition of plant or animals wastes which provides lots of humus to the soil. Identify the incorrect statements regarding decomposition.
View Solution