10 Differences Between archaebacteria and eubacteria

Difference Between Archaebacteria and Eubacteria

Archaebacteria and Eubacteria are two main groups of bacteria that exhibit distinct characteristics and roles in different environments. In this article, we will explore the features, examples, and uses of both archaebacteria and eubacteria. Additionally, we will present a comprehensive table highlighting their key differences.

What are Archaebacteria?

Archaebacteria, also known as archaea, are single-celled microorganisms that constitute one of the three major domains of life. They were initially categorized as bacteria due to their microscopic appearance, but further research revealed their unique biological characteristics.

Examples of Archaebacteria

  • Methanogens: Found in anaerobic environments such as marshes, where they convert hydrogen and carbon dioxide into methane gas.
  • Halophiles: Thrive in extremely salty environments like the Dead Sea and Great Salt Lake.
  • Thermophiles: Flourish in high-temperature regions, such as hot springs and deep-sea hydrothermal vents.

What are Eubacteria?

Eubacteria, also called true bacteria, are a vast group of prokaryotic microorganisms found in diverse habitats ranging from soil to the human body. They have a rigid cell wall and can exhibit various shapes, including cocci, bacilli, and spirilla.

Examples of Eubacteria

  • Escherichia coli (E. coli): Commonly found in the human digestive system and is used as a model organism in scientific research.
  • Streptococcus pyogenes: Causes strep throat and various skin infections.
  • Bacillus subtilis: Widely utilized in the production of enzymes and antibiotics.

Differences Between Archaebacteria and Eubacteria

Difference Area Archaebacteria Eubacteria
Cell Wall Composition Cell walls contain pseudopeptidoglycan, polysaccharides, and glycoproteins. Cell walls consist of peptidoglycan.
Habitat Live in extreme environments like hot springs, deep-sea vents, and highly salty or acidic habitats. Found in various environments, including soil, water, plants, and animals.
Nuclear Membrane Do not possess a nuclear membrane. Have a well-defined nuclear membrane.


In summary, both archaebacteria and eubacteria are distinct groups of microorganisms with significant differences in cell wall composition, habitat preference, and nuclear membrane presence. Archaebacteria are known for their ability to survive in extreme environments, while eubacteria have a wide range of habitats and ecological roles.

People Also Ask:

  • Q: What is the difference between archaebacteria and eubacteria in terms of habitat?
    Archaebacteria thrive in extreme environments, while eubacteria can be found in various habitats including soil, water, plants, and animals.
  • Q: Do archaebacteria and eubacteria have different cell wall compositions?
    Yes, archaebacteria have a cell wall composed of pseudopeptidoglycan, polysaccharides, and glycoproteins, while eubacteria have cell walls consisting of peptidoglycan.
  • Q: Are archaebacteria more commonly found in the human body than eubacteria?
    No, eubacteria are more commonly found in the human body, while archaebacteria are predominantly present in extreme environments.
  • Q: Do archaebacteria and eubacteria have distinct nuclear membranes?
    Archaebacteria do not possess a well-defined nuclear membrane, whereas eubacteria have a well-defined nuclear membrane.
  • Q: Do archaebacteria and eubacteria have any practical uses?
    Yes, both archaebacteria and eubacteria have various applications in fields such as biotechnology, food production, and environmental cleanup.

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