Archaebacteria - Encyclopedia.com
WEBMay 29, 2018 · Archaebacteria are microscopic organisms with diameters ranging from 0.0002–0.0004 in (0.5–1.0 micrometer). The volume of their cells is only around one-thousandth that of a typical eukaryotic cell. They come in a variety of shapes, which can be characterized into three common forms.
Archaea - Encyclopedia.com
WEBJun 11, 2018 · Archaea A domain (or subkingdom) of prokaryotic organisms containing the archaebacteria, including the methanogens, which produce methane; the thermoacidophilic bacteria, which live in extremely hot and acidic environments (such as hot springs; see thermophilic); and the halophilic bacteria, which can only function at high salt …
Bacterial Kingdoms - Encyclopedia.com
WEBBacterial kingdoms are part of the classification scheme that fits bacteria into appropriate groupings based on certain criteria. The kingdom is the broadest classification category. There are two kingdoms of prokaryotes. These are the bacteria (or eubacteria ) and the archaebacteria (or the Archaea ). The members of these two kingdoms appear ...
Prokaryota - Encyclopedia.com
WEBProkaryota The prokaryota are one of the two major groups of biological organisms. The other is the eukaryota . Prokaryotes consist of two kingdoms: the archaebacteria and the eubacteria. Prokaryotes contribute the greatest biomass (amount of living matter) of any biological group and inhabit virtually all known earthly environments.
Kingdom - Encyclopedia.com
WEBMay 21, 2018 · Molecular evidence, particularly from ribosomal ribonucleic acid (RNA), suggests that the five-kingdom scheme is also too simple. Some biologists believe that Protista should be partitioned into three or more kingdoms. Similarly, kingdom Monera contains two very biochemically distinct groups of prokaryotes: archaebacteria, and …
Kingdoms of Life - Encyclopedia.com
WEBWhittaker's five kingdoms are Monera, Protista, Plantae, Fungi, and Animalia. One kingdom, Monera, contains all the prokaryotes , and the other kingdoms contain different groups of eukaryotes. However, work done in the 1980s by Carl R. Woese of the University of Illinois on the genetic makeup of cells seems to favor a six-kingdom system that ...
Prokaryotae - Encyclopedia.com
WEBArchaebacteria live in extreme environments such as deep-sea vents, hot springs, and very salty water. Finally, some metabolic processes of Archaebacteria are different from other bacteria. The feature that most distinguishes the bacteria and blue-green algal members of the Prokaryote from the members of the other kingdoms is the lack of ...
Eubacteria - Encyclopedia.com
WEBMay 29, 2018 · Some scientists regard the Eubacteria group as an artificial assemblage, merely a group of convenience rather than a natural grouping. Other scientists regard eubacteria as comprising their own kingdom. Another recent classification holds Eubacteria and Archaebacteria as domains or major groupings, classified above the kingdom level.
Bacteria - Encyclopedia.com
WEBMay 21, 2018 · Examples of archaebacteria are those bacteria which currently live in extremely salty environments or extremely hot environments, like geothermal vents of the ocean floor. Characteristics of bacteria Although all bacteria share certain structural, genetic, and metabolic characteristics, important biochemical differences exist among …
Cyanobacteria - Encyclopedia.com
WEBJun 27, 2018 · Cyanobacteria (blue- green algae) are microorganisms that structurally resemble bacteria (they lack a nucleus and organelles ). However, unlike other bacteria, cyanobacteria contain chlorophyll a and conduct oxygenic photosynthesis. Cyanobacteria are approximately 2.5 billion years old and thus are the oldest oxygenic phototrophs on …
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