Superkingdom
Superkingdom or Domain is the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level. There are three domains of life: Bacteria, Archaea, and Eukarya.
Overview[edit | edit source]
The concept of a superkingdom was first proposed by Carl Woese et al. in 1977. They based their classification on the differences in the ribosomal RNA structure. This molecular approach allowed them to identify and classify organisms that were not easily classified by morphological methods.
Bacteria[edit | edit source]
Bacteria are single-celled organisms that lack a nucleus. They are found in every habitat on Earth, including soil, water, and the human gut. Bacteria play a crucial role in the ecosystem, including nutrient cycling and human health.
Archaea[edit | edit source]
Archaea are also single-celled organisms that lack a nucleus. However, they are distinct from bacteria in their genetics and biochemistry. Archaea are often found in extreme environments, such as hot springs and salt lakes.
Eukarya[edit | edit source]
Eukarya is the domain that includes organisms with a nucleus. This domain includes all multicellular organisms, including animals, plants, and fungi, as well as some single-celled organisms like protozoa.
Classification[edit | edit source]
The classification of organisms into domains is based on the differences in the structure and sequence of the ribosomal RNA. Other factors, such as the presence or absence of a nucleus, cell wall composition, and metabolic pathways, are also considered.
See also[edit | edit source]
- Taxonomy (biology)
- Kingdom (biology)
- Phylum
- Class (biology)
- Order (biology)
- Family (biology)
- Genus
- Species
Superkingdom Resources | ||
---|---|---|
|
|
Navigation: Wellness - Encyclopedia - Health topics - Disease Index - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
WikiMD is not a substitute for professional medical advice. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Contributors: Prab R. Tumpati, MD