Search results
Results from the WOW.Com Content Network
There is a great diversity of life forms found in ponds, especially as seen under the microscope. These include the largest free-living protozoan known – Stentor , probably the toughest animal known – the tardigrade or "Water bear". [ 12 ]
Species of Euglena were among the first protists to be seen under the microscope. In 1674, in a letter to the Royal Society, the Dutch pioneer of microscopy Antonie van Leeuwenhoek wrote that he had collected water samples from an inland lake, in which he found "animalcules" that were "green in the middle, and before and behind white."
A typical example of a ciliated microorganism is the Paramecium, a one-celled, ciliated protozoan covered by thousands of cilia. The cilia beating together allow the Paramecium to propel through the water at speeds of 500 micrometers per second. [48] Flagellate, ciliates and amoeba
Protozoa (sg.: protozoan or protozoon; alternative plural: protozoans) are a polyphyletic group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic debris.
S. roeselii is found in still or slow-moving bodies of water, where it feeds on bacteria, flagellates, algae, and other ciliates. When feeding, the cell is fixed in place , attached by a posterior "holdfast" organelle to a firm surface such as plant stem or submerged detritus. Attached specimens are trumpet-shaped, and very contractile.
Paramecium bursaria is a species of ciliate found in marine and brackish waters. [1] It has a mutualistic endosymbiotic relationship with green algae called Zoochlorella.About 700 Chlorella cells live inside the protist's cytoplasm and provide it with food, while the Paramecium provides the algae with movement and protection. [2]
Microorganisms make up about 70% of the marine biomass. [4] A microorganism, or microbe, is a microscopic organism too small to be recognised adequately with the naked eye. In practice, that includes organisms smaller than about 0.1 mm. [12]: 13
Habitats may include moist soil, mud and plant roots. [6] This protozoan is ciliated and is mainly found in fresh water environments. [7] They are known to feed on bacteria and can also form extracellular associations with mosquitoes, nematodes, prawns and tadpoles. [6]