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Bacteria - Wikipedia
Bacteria (/ b æ k ˈ t ɪər i ə / (); common noun bacteria, singular bacterium) are a type of biological cell.They constitute a large domain of prokaryotic microorganisms.Typically a few micrometres in length, bacteria have a number 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 of its habitats.
Bacteria: Definition, Types & Infections
Bacteria are microscopic single-celled organisms that can be helpful, such as those that live in our guts, or harmful, such as flesh-eating bacteria.
bacteria | Cell, Evolution, & Classification | Britannica.com
Bacteria lack a membrane-bound nucleus and other internal structures and are therefore ranked among the unicellular life-forms called prokaryotes.Prokaryotes are the dominant living creatures on Earth, having been present for perhaps three-quarters of Earth history and having adapted to almost all available ecological habitats.
Bacteria: What you need to know - Medical News Today
Bacteria are single-celled organisms that exist in their millions, in every environment, inside or outside other organisms. Some are harmful, but others support life. They play a crucial role in ...
Bacteria | Definition of Bacteria at Dictionary.com
Bacteria definition, ubiquitous one-celled organisms, spherical, spiral, or rod-shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom Monera (in some classification systems the plant class Schizomycetes), various species of which are involved in fermentation, putrefaction, infectious diseases, or nitrogen fixation.
Bacteria - definition of bacteria by The Free Dictionary
bac·te·ri·a (băk-tîr′ē-ə) n. Plural of bacterium. bacteria (bækˈtɪərɪə) pl n, sing -rium (-rɪəm) (Microbiology) a very large group of microorganisms comprising one of the three domains of living organisms. They are prokaryotic, unicellular, and either free-living in soil or water or parasites of plants or animals. See also prokaryote ...
Bacteria | Definition and Patient Education
Bacteria are single-celled, or simple, organisms. Though small, bacteria are powerful and complex, and they can survive in extreme conditions.
Introduction to the Bacteria
Introduction to the Bacteria. Bacteria are often maligned as the causes of human and animal disease (like this one, Leptospira, which causes serious disease in livestock).However, certain bacteria, the actinomycetes, produce antibiotics such as streptomycin and nocardicin; others live symbiotically in the guts of animals (including humans) or elsewhere in their bodies, or on the roots of ...
Bacteria - The New York Times
matter Scientists Created Bacteria With a Synthetic Genome. Is This Artificial Life? In a milestone for synthetic biology, colonies of E. coli thrive with DNA constructed from scratch by humans ...
Bacteria - Simple English Wikipedia, the free encyclopedia
Bacteria (sing.bacterium) are very small organisms.They are prokaryotic microorganisms.Bacterial cells do not have a nucleus, and most have no organelles with membranes around them. Most have a cell wall.They do have DNA, and their biochemistry is basically the same as other living things. They are amongst the simplest and the oldest organisms. They function as independent organisms.