What is bacteria?

  • (noun): (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered plants.
    Synonyms: bacterium

Bacteria

Bacteria (/bækˈtɪəriə/; singular: bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most habitats on the planet, growing in soil, acidic hot springs, radioactive waste, water, and deep in the Earth's crust, as well as in organic matter and the live bodies of plants and animals, providing outstanding examples of mutualism in the digestive tracts of humans, termites and cockroaches.

Read more about Bacteria.

Some articles on bacteria:

Black Fly - Ecology
... This basic environment provides conditions ideally suited to bacteria that metabolise cellulose ... cellulose independently, but the presence of these bacteria allow cellulose to be metabolised into basic sugars ... This provides nutrition to the black fly larvae, as well as the bacteria ...
Bacteria - Significance in Technology and Industry
... Further information Economic importance of bacteria Bacteria, often lactic acid bacteria such as Lactobacillus and Lactococcus, in combination with yeasts and molds ... The ability of bacteria to degrade a variety of organic compounds is remarkable and has been used in waste processing and bioremediation ... Bacteria capable of digesting the hydrocarbons in petroleum are often used to clean up oil spills ...
Antimicrobial Peptides - Activities
... of action by which antimicrobial peptides kill bacteria is varied and includes disrupting membranes, interfering with metabolism, and targeting cytoplasmic components ... In contrast to many conventional antibiotics these peptides appear to be bacteriocidal (bacteria killer) instead of bacteriostatic (bacteria growth inhibitor) ...
Desulfotomaculum
... Desulfotomaculum is a genus of Gram-positive, obligately anaerobic soil bacteria ... A type of sulfate-reducing bacteria, Desulfotomaculum can cause food spoilage in poorly processed canned foods ... They are endospore-forming bacteria ...
Issues With Poultry Farming - Antibiotics
... The mechanism is apparently the adjustment of intestinal flora, favoring "good" bacteria while suppressing "bad" bacteria that provoke inflammation of the ... the risk of slaughtered chickens harboring pathogenic bacteria and passing them on to humans that consume them ...

Famous quotes containing the word bacteria:

    To the eyes of a god, mankind must appear as a species of bacteria which multiply and become progressively virulent whenever they find themselves in a congenial culture, and whose activity diminishes until they disappear completely as soon as proper measures are taken to sterilise them.
    Aleister Crowley (1875–1947)