Title: The Six Kingdoms of Life | Sciencing
Headings: The Six Kingdoms of Life
The Six Kingdoms of Life
Updated October 29, 2018
TL;DR (Too Long; Didn't Read)
A Breakdown of Kingdom Biology
Archaebacteria and Eubacteria
Fungi and Protista

Content: Archaebacteria are single-celled, and they don’t have a cell nucleus. They’re also able to survive in harsh environments like volcanic hot springs or salt lakes. For that reason, they are likely the oldest surviving kingdom of life. They are grouped into categories like methanogens and thermoacidophiles. As the name suggests, methanogens produce methane, which is why they are commonly used to treat wastewater. Thermoacidophiles can live in environments that are both very hot and very acidic, such as deep sea vents and hot springs. You probably encounter eubacteria more often than you do archaebacteria. A diverse group of bacteria belongs to the Eubacteria kingdom. Some, like bacilli and spirilla, can lead to harmful strains of E. coli or cause unpleasant diarrhea when consumed. For this reason, eubacteria often gets a bad reputation for spreading disease.