Nitrogen fixation, Biology

Assignment Help:

Nitrogen Fixation

Nitrogen is an essential constituent of living organisms and there is an inexhaustible supply of it in the atmosphere in the free form. Majority of living organisms including humans are incapable of utilising gaseous nitrogen but need organic nitrogen for their nutrition. It is for this reason that the nitrogen fixation or availability of organic nitrogen is critical for the living organisms. Free nitrogen is inert but certain groups of specialised organisms have the ability to utilise gaseous nitrogen fmn the atmosphere. The reduction of gaseous nitrogen or its conversion to organic nitrogen is called nitrogen fixation. The fixed nitrogen is readily utilised by other organems. Incorporation of atmospheric nitrogen into nitrogen compounds by nitrogen fixers such as Azotobacter in aerated soils; Clostridium in unaerated soils; Rhizobium in the nodules of legume roots and by a number of blue green algae such as Nostoc and Anabaena, is the most important step to ensure nitrogen supply for the living organisms. The quantum of biological nitrogen-fixation has direct effect on soil fertility.


Related Discussions:- Nitrogen fixation

Find which two amino acids make up this pocket, Sickling occurs in deoxyhem...

Sickling occurs in deoxyhemoglobin, but not in oxyhemoglobin. Normal deoxyhemoglobin (HbA and HbS) molecules have a small hydrophobic "pocket" on the surface of a ? chain. In oxyhe

Microscopy, describe the importance,principles,techniques and uses of micro...

describe the importance,principles,techniques and uses of microscopy

Do fishes present an closed or open circulatory system, Q Do fishes present...

Q Do fishes present an closed or open circulatory system? How many chambers does a fish heart have? How does blood flow throughout the fish body? As in every vertebrate the cir

Plant classfication, why obelia is considered to be of special interest in ...

why obelia is considered to be of special interest in zoology as an animal showing an intermediate grade of organisation

Aortic valve repair-types of surgery in ar, Aortic Valve Repair :  ...

Aortic Valve Repair :  In, acquired AR associated with VSD and prolapse of a cusp, repair is often successful. VSD is closed and at the same time the prolapsed part of

Define exocytosis , A cell frequently wants to secrete larger molecule...

A cell frequently wants to secrete larger molecules than can be accommodated through the transport systems dealt with in Topic E3. Exocytoses get to the movement of proteins out of

Factors that affects oxygen dissociation curve - temperature, Factors that ...

Factors that affects Oxygen Dissociation Curves - Temperature At higher temperature haemoglobin gives up oxygen more readily and the dissociation curve shifts to the right. Th

Briefly explain about the chromium, Briefly Explain about the Chromium? ...

Briefly Explain about the Chromium? As you will go through this section, you will realize that compared to other minerals, the essentiality of chromium was recognized very late

How age affects the bmr, How Age affects the BMR? The BMR per unit weig...

How Age affects the BMR? The BMR per unit weight also varies with age, being higher in children and lower in the elderly. The loss of FFM with ageing is associated with a decli

Homeostasis , Homeostasis Homeostasis may be defined as the maintenan...

Homeostasis Homeostasis may be defined as the maintenance of constancy in the internal environment of the organism. This is essential for maintenance of life. Without homeost

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd