BioNotes
Class 7

Monera

Note on Monera

Kingdom Classification - Monera

Characteristics

  • Unicellular: Organisms in this kingdom are single-celled.
  • Prokaryotic: They lack a true nucleus and other membrane-bound organelles.
  • Cell Wall: Most have a cell wall, but it is not made of cellulose.
  • Nutrition: Can be autotrophic (photosynthetic or chemosynthetic) or heterotrophic.
  • Reproduction: Primarily by binary fission.

Bacteria

  • Shape: Bacteria can have various shapes:
    • Cocci: Spherical (e.g., Streptococcus)
    • Bacilli: Rod-shaped (e.g., Lactobacillus)
    • Spirilla: Spiral-shaped (e.g., Spirillum)
    • Vibrio: Comma-shaped (e.g., Vibrio cholerae)
  • Food Production: Used in making yogurt, cheese, buttermilk, and vinegar.
  • Medicine: Used to produce antibiotics (e.g., Streptomycin) and vaccines.
  • Agriculture: Nitrogen-fixing bacteria (e.g., Rhizobium) convert atmospheric nitrogen into a usable form for plants, enriching soil fertility.
  • Decomposition: Decomposers break down dead organic matter, recycling nutrients in the ecosystem.
  • Bioremediation: Used to clean up oil spills and other pollutants.
  • Diseases: Cause various diseases in humans (e.g., Cholera, Tuberculosis, Typhoid), animals, and plants.
  • Food Spoilage: Cause food to rot and become unfit for consumption.
  • Denitrification: Some bacteria convert nitrates back into atmospheric nitrogen, reducing soil fertility.
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Created by Titas Mallick

Biology Teacher • M.Sc. Botany • B.Ed. • CTET Qualified • 10+ years teaching experience