Question

The micro-organisms that convert the dead plants and animals to humus are known as:
1. Bacteria
2. Fungus
3. Protozoa
4. Decomposers

Answer 1

Correct Answer - Option 4 : Decomposers

The correct answer is Decomposers.

• 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.

• Bacteria belongs to the animal kingdom Monera.
  • Bacteria was discovered by Anton Van Leeuwenhoek.
  • The reproduction of bacteria is mainly by binary fission.
• Fungi are multinucleated.
  • The body of the fungus is made of filaments called Mycelium.
  • Rhizopus is the fungi grown in bread.
• Protozoa is a group of unicellular eukaryotic organisms.
  • Euglena, paramecium, Trypanosoma are examples of Protozoa.