Which of these organisms use nitrogen directly from the air: blue-green algae protozoa plants worms Biological nitrogen fixation The conversion of atmospheric nitrogen into ammonium ions or nitrates by bacteria or other microorganisms is called biological nitrogen fixa...
S ummary : The ability of micro-organisms to use sulphamic acid in the form of the sodium salt as a source of nitrogen appeared to be generally uncommon, but certain strains of Aureobasidium ( Pullularia ) pullulans and Cephalosporium acremonium (?), and also two unidentified species of ...
Industrial ammonification, which requires large amounts of energy, is used to create ammonia and nitrate for use as agricultural fertilizer. Industrial processes convert approximately 80 million metric tons of nitrogen per year, whereas bacterial nitrogen fixation converts slightly more, with about half...
Although nitrogen gas is abundant in the air, plants are unable to use nitrogen in this form, but they can readily use the ammonia formed by these bacteria and thus benefit from this symbiosis. As with mycorrhizal associations, the host plant benefits its symbiont by providing a carbohydrate ...
Early organisms in the Precambrian Era converted what to oxygen? What were the first organisms on earth? What were the first life forms on Earth? What kinds of organisms can remove nitrogen from the atmosphere? Which organisms play a role in returning carbon to the atmosphere?
Fig. 3. Exemplary carbon (green) and nitrogen (blue) fluxes in (A) a termite metaorganism and (B) a coral metaorganism. In both cases the animal host is nutrient-limited, yet this limitation is attenuated or overcome due to nutrient exchange and/or nutrient recycling with/by microorganisms...
N2-fixation was detectable throughout the upper 200 m at most stations, with rates ranging from 0.001 to 0.19 nM N hÀ1. N2-fixation in the SPG may account for the production of 8–20% of global oceanic new nitrogen. Interestingly, comparable 15N2-fixation rates were measured under light...
Because these model organisms were so convenient, and made progress so rapid, researchers flocked to use them. This led to the development of tools and resources specifically for these organisms. Resources include infrastructure, such as databases and strain collections, as well as molecular toolkits...
In its interaction with the environment, an organism is coordinated on the cytoplasmic, cellular, tissular, organic, and organismic levels so as to act as a unified system. The formation of a complete organism in phylogeny consists in the differentiation and integration of cells, tissues, organs,...
optionally substituted phenyl, or R 4 and R 5 together with the nitrogen atom to which they are attached form a heterocyclic ring which may be substituted and which may also contain an additional heteroatom, a process for preparing these substances and their use for controlling undesirable ...