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4 days ago · Bacteria (/ b æ k ˈ t ɪər i ə / ⓘ; sg.: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats.
- Earliest Known Life Forms
Evidence of possibly the oldest forms of life on Earth has...
- Parasitic
A fish parasite, the isopod Cymothoa exigua, replacing the...
- Genetically Modified Bacteria
History. The first example of this occurred in 1978 when...
- Earliest Known Life Forms
5 days ago · Learn about bacteria, the microscopic single-celled organisms that are among the most diverse and abundant life-forms on Earth. Find out how bacteria differ from eukaryotic cells, how they evolved, and what roles they play in various environments and human activities.
5 days ago · Synonyms. Bacillus coli communis Escherich 1885. Escherichia coli ( / ˌɛʃəˈrɪkiə ˈkoʊlaɪ / ESH-ə-RIK-ee-ə KOH-ly) [1] [2] is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms.
1 day ago · Cyanobacteria ( / saɪˌænoʊbækˈtɪəri.ə / ), also called Cyanobacteriota or Cyanophyta, are a phylum of autotrophic gram-negative bacteria [4] that can obtain biological energy via oxygenic photosynthesis.
5 days ago · Updated on May 24, 2024. Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on Earth. As organized in the Three Domain System, prokaryotes include bacteria and archaeans. Some prokaryotes, such as cyanobacteria, are photosynthetic organisms capable of photosynthesis.
- Regina Bailey
4 days ago · Bacterial evolution is the process of heritable change in populations of bacteria over multiple generations. It occurs through mechanisms including natural selection and genetic drift, and can...
4 days ago · antibiotic resistance, loss of susceptibility of bacteria to the killing (bacteriocidal) or growth-inhibiting (bacteriostatic) properties of an antibiotic agent. When a resistant strain of bacteria is the dominant strain in an infection, the infection may be untreatable and life-threatening.
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