Search results
Results from the WOW.Com Content Network
Bacterial motility is the ability of bacteria to move independently using metabolic energy. ... are monoflagellated and have a single flagellum at one pole of the ...
While bacterial cells often have many flagellar filaments, each of which rotates independently, the archaeal flagellum is composed of a bundle of many filaments that rotates as a single assembly. Bacterial flagella grow by the addition of flagellin subunits at the tip; archaeal flagella grow by the addition of subunits to the base.
Many bacteria, such as Vibrio, are monoflagellated and have a single flagellum at one pole of the cell. Their method of chemotaxis is different. Others possess a single flagellum that is kept inside the cell wall. These bacteria move by spinning the whole cell, which is shaped like a corkscrew. [25] [page needed]
"Flagellata" from Ernst Haeckel's Artforms of Nature, 1904 Parasitic Excavata (Giardia lamblia) Green algae (Chlamydomonas). A flagellate is a cell or organism with one or more whip-like appendages called flagella.
Pseudomonas aeruginosa in Petri dish. Pseudomonas aeruginosa is a common encapsulated, Gram-negative, aerobic–facultatively anaerobic, rod-shaped bacterium that can cause disease in plants and animals, including humans.
Salmonella species lead predominantly host-associated lifestyles, but the bacteria were found to be able to persist in a bathroom setting for weeks following contamination, and are frequently isolated from water sources, which act as bacterial reservoirs and may help to facilitate transmission between hosts. [31]
The dinoflagellate nucleus was termed 'mesokaryotic' by Dodge (1966), [36] due to its possession of intermediate characteristics between the coiled DNA areas of prokaryotic bacteria and the well-defined eukaryotic nucleus.
A paper released in August 2017 showed that environmental changes, including the presence of certain bacteria, trigger the swarming and subsequent sexual reproduction of choanoflagellates. [28] The ploidy level is unknown; [ 29 ] however, the discovery of both retrotransposons and key genes involved in meiosis [ 30 ] previously suggested that ...