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Home/ Questions/Q 7892
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Bhanu singh
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Bhanu singh
Asked: February 26, 20212021-02-26T06:55:58+00:00 2021-02-26T06:55:58+00:00In: Class 11 Biology

Define decomposition and describe the processes and products of decomposition.

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NCERT Solutions for Class 12 Biology Chapter 13 Organisms and Populations
Important Board Questions
Organisms and Populations
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Question : 12

2020-2021cbsechapter 13class 12 biologyclass 12 sciencencertorganisms and populations
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    1. Rajita
      2021-02-26T07:06:16+00:00Added an answer on February 26, 2021 at 7:06 am

      Decomposition is the process that involves the breakdown of complex organic matter or biomass from the body of dead plants and animals with the help of decomposers into inorganic raw materials such as carbon dioxide, water, and other nutrients. The various processes involved in decomposition are as follows:
      1. Fragmentation: It is the first step in the process of decomposition. It involves the breakdown of detritus into smaller pieces by the action of detritivores such as earthworms.
      2. Leaching: It is a process where the water soluble nutrients go down into the soil layers and get locked as unavailable salts.
      3. Catabolism: It is a process in which bacteria and fungi degrade detritus through various enzymes into smaller pieces.
      4. Humification: The next step is humification which leads to the formation of a dark coloured colloidal substance called humus, which acts as reservoir of nutrients for plants.
      5. Mineralization: The humus is further degraded by the action of microbes, which finally leads to the release of inorganic nutrients into the soil. This process of releasing inorganic nutrients from the humus is known as mineralization.
      Decomposition produces a dark coloured, nutrient-rich substance called humus. Humus finally degrades and releases inorganic raw materials such as CO2, water, and other nutrient in the soil.

      For more answers visit to website:
      https://www.tiwariacademy.com/ncert-solutions/class-12/biology/chapter-13/

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