WebDiatoms are photosynthetic organisms referred to as algae with a length/diameter of between 2 and 500 microns. They have a transparent cell wall (frustule) made of silicon … Diatoms are classified as eukaryotes, organisms with a nuclear envelope-bound cell nucleus, that separates them from the prokaryotes archaea and bacteria. Diatoms are a type of plankton called phytoplankton, the most common of the plankton types. Diatoms also grow attached to benthic substrates, floating debris, … See more A diatom (Neo-Latin diatoma) is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a … See more Diatoms are generally 2 to 200 micrometers in size, with a few larger species. Their yellowish-brown chloroplasts, the site of photosynthesis, are typical of heterokonts, having four cell membranes and containing pigments such as the carotenoid See more Most centric and araphid pennate diatoms are nonmotile, and their relatively dense cell walls cause them to readily sink. Planktonic forms … See more Distribution Diatoms are a widespread group and can be found in the oceans, in fresh water, in soils, and on damp surfaces. They are one of the dominant … See more Diatoms are protists that form massive annual spring and fall blooms in aquatic environments and are estimated to be responsible for … See more Diatom cells are contained within a unique silica cell wall known as a frustule made up of two valves called thecae, that typically overlap one another. The biogenic silica composing the cell … See more Reproduction and cell size Reproduction among these organisms is asexual by binary fission, during which the diatom divides into two parts, producing two "new" diatoms with identical genes. Each new organism receives one of the two See more

Fragilaria - Wikipedia

WebDiatoms (Greek: διά (dia) = "through" + τέμνειν (temnein) = "to cut", i.e., "cut in half") are a major group of eukaryotic algae, and are one of the most common types of … eastern industrial automation pay rate

Diatom - Wikipedia

WebDiatoms are traditionally divided into two orders: centric diatoms (Centrales), which are radially symmetrical; pennate diatoms (Pennales), which are bilaterally symmetrical. The … WebThe classification system developed by Simonsen (1979) and further developed by Round et al. (1990) is currently the most commonly accepted. Diatoms commonly found in the marine plankton may be divided into the centric diatoms including three sub-orders based primarily on the shape of the cells, the polarity and the arrangement of the processes. WebThe diatoms are a phylum of unicellular photosynthetic algae and are a group significant for their unique structure and ecology. Taxonomy and phylogeny The diatoms represent … cuf trabalho