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Micro-organisms act upon the dead plants to produce

Micro-organisms act upon the dead plants to produce Correct Answer humus

The correct answer is humus.

  • Humus is the amorphous, dark coloured and colloidal substance which is highly resistant to microbial action.
    • It undergoes decomposition at an extremely slow rate.
    • It can also act as a bank for nutrients.
    • The process that leads to the formation of humus is known as, Humification.
    • The micro-organisms that convert the dead plants and animals to humus are known as decomposers.
    • Bacteria and Fungi are examples of decomposers.
    • As they break-down the complex organic substances into simple inorganic substances that go into the soil and are reused by the plants.
    • When an organism dies it is converted to detritus or dead biomass that serves as an energy source for decomposers.
    • The process by which decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients and the process is called decomposition.

Additional Information

  • 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.
  • Being colloidal in nature it serves as a reservoir of nutrients.
  • The humus is further degraded by some microbes and release of inorganic nutrients occur by the process known as mineralisation.
  • The dark colour amorphous substance that is highly resistant to microbial action and undergoes decomposition at an extremely slow rate is called humification.
    • 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.

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The Proper sequence should be:
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Micro-organism act upon the dead plant to produce: