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Paper Topic:

Explaining Relationships

Running head : Explaining relationships

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Date : Explaining relationships

A relationship is an association or connection between two or more entities and associated mutual contact . An association is regarded as symbiotic if the parties to the relationship coexist for prolonged periods of time and derive benefits . Many mutualisms encompass intricate control mechanisms and exhibit reciprocal usefulness

Leguminous plants of the Fabaceae family have a certain kind of association with Rhizobium bacteria that exists freely in soil and invades root nodules . Legumes include alfalfa , clover , beans

, peanuts and lupines . Both the legume and the bacteria can exist separately , are facultative . Nitrogen fixation , a bacteria-plant partnership , can however be achieved when the two entities work in coordination . The bacteria intrude into the plant occasioning the appearance of root nodules owing to the increase of plant cells . The bacteria are always alienated from the plant cytoplasm by a protective membrane . Both organisms benefit from this mutual relationship . This relationship allows legumes to synthesize proteins ( HYPERLINK "http /users .rcn .com /jkimball .ma .ultranet /BiologyPages /N /NitrogenFixati on .html http /users .rcn .com /jkimball .ma .ultranet /BiologyPages /N /NitrogenFixatio n .html

Plants require nitrogen to manufacture nucleic acids , amino acids proteins and numerous cellular nitrogenous components . Nitrogen in form of gas (N2 ) is very much abundant in the atmosphere- more then 78 composition . The existence of a triple bond between two nitrogen atoms makes it unavailable fro use by plants . To be utilized by plants nitrogen must be fixed ' or , joined in the...

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