What was the basis of classification for archaea and eubacteria in the six kingdom classification?
Six kingdom classification:
He separated eubacteria and archebacteria on the basis of:
Archaebacteria and eubacteria can be classified under different classes based on the following differences
ARCHAEBACTERIA | EUBACTERIA | |
CELL WALL | The cell wall is composed of pseudopeptidoglycan. | The cell wall is made of muramic acid/lipopolysaccharides with peptidoglycan. |
MODE OF REPRODUCTION | The archaea perform asexual reproduction. | The eubacteria reproduce through sexual as well as asexual reproduction. |
PATHOGENICITY | They are non-pathogenic. | Eubacteria are generally pathogenic. |
METABOLISM | Archae can use hydrogen, oxygen, methane, carbon dioxide, hydrogen sulfide, sulfur, and some species can also use ammonia. | Eubacteria can be classified as :
|
NUTRITION | Archae can be of different types:
| Chemosynthesis, photosynthesis, or absorption. |
HABITAT | Archae can live in extreme conditions like hot springs, geothermal vent, ocean depth, etc. | They are found in air, water, soil, and on or in other animals. |
LINKAGE IN CELL WALL | The lipids in the cell wall have the hydrocarbon chains attached by ether linkages to the glycerol molecule. | The glycerol is attached to the hydrocarbon chains by ester linkages. |
rRNA | ribosomal RNA has 16S rRNA, 23S, and 5S rRNAs intricated with 60-70 ribosomal proteins. | 16s, 23s, and 5s are transcribed together to make a single rRNA molecule. |
ORGANISM | Methanogens, halophiles, thermophiles, and psychrophiles | Bacteria, cynobacteria. |