Archaebacteria differ from eubacteria in: Mode of nutrition Cell wall composition Habitat Reproduction method

Archaebacteria and Eubacteria, also known as Archaea and Bacteria respectively, are two of the three domains of life, with the third being Eukarya. They differ in several ways:

1. Mode of Nutrition:

   • Archaebacteria: Many are chemotrophs, meaning they obtain energy by oxidizing inorganic substances, and some are autotrophs, meaning they can produce their own food from inorganic substances.
   • Eubacteria: They can be autotrophs or heterotrophs. Autotrophic eubacteria can produce their own food through photosynthesis or chemosynthesis, while heterotrophic eubacteria obtain energy by consuming organic material.

2. Cell Wall Composition:

   • Archaebacteria: Their cell walls do not contain peptidoglycan. Instead, they have a variety of other substances, including proteins, glycoproteins, and polysaccharides.
   • Eubacteria: Their cell walls are primarily composed of peptidoglycan.

3. Habitat:

   • Archaebacteria: They are often found in extreme environments, such as hot springs, salt lakes, and the human gut.
   • Eubacteria: They are found in a variety of environments, including soil, water, and the human body.

4. Reproduction Method:

   • Archaebacteria: They reproduce asexually through a process called binary fission, similar to eubacteria. However, they also have a unique form of genetic recombination called horizontal gene transfer.
   • Eubacteria: They also reproduce asexually through binary fission. Some can also exchange genetic material through a process called conjugation.