The three domains system
The three Domain system is a biological classification introduce by Carl Woese in 1990 that divides cellular life forms into archaea, bacteria, eukaryote.
Archaea Domain-prokaryotic, no cellular membrane, distting biochemistry and RNA markers from eubacteria, possess unique and ancient evolutionary history from which they are considered some of the oldest species of organism on the earth classify as archaebacteria for living in extreme environment.
Kingdom Archaebacteria
Examples:
Methanogens- metabolize hydrogen and carbon dioxide into methane.
Halophiles- thrive in salt.
Thermoacidophiles-thrive in acid and high temperature ( up to 110 degrees Celsius).
Bacteria Domain-prokaryotic, classify as bacteria, and all known pathogenic prokaryotic organism.
Kingdom Eubacteria
Examples:
Cyanobacteria- photosynthesizing bacteria.
Spirochaete-Gram-negative bacteria that includes those causing syphilis and Lyme disease.
firmicutes- Gram-positive bacteria including bifidobacterum animalis which is present in the human large intestine.
Eukaryote Domain-Eukaryote, nuclear membrane.
Kingdom Protista
Examples:
Rhodophita-red algae.
Chromalveolata-includes dinoflagellates.
Kingdom fungi
Examples:
Saccharomycotina-includes true yeasts.
Basidiomycota-includes shiitake mushrooms.
Kingdom plantae or Plants
Examples:
Byrophita-mosses
Magnoliophita-flowering plant
Kingdom Animalia
Examples:
Arthropods-includes insects, arachnids, and crustaceans.
Chordates- includes vertebrates and, as such, humans beings.
No comments:
Post a Comment