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

Contagious bovine pleuropneumonia (cbpp), Contagious bovine pleuropneumonia...

Contagious bovine pleuropneumonia (CBPP) This is a highly infectious disease and is of major economic importance in certain tropical countries. The causative organism is Mycop

Removal of obturating material -endodontics principles, Removal of obturati...

Removal of obturating material -Gutta percha . -Carrier  bassed gutta perca. -silver points . - paste type. - obstructed fracture instrument .

State the method of recombination or crossing-over, Which of the following ...

Which of the following statement is false regarding the method of recombination or crossing-over? A. Crossing-over takes place during prophase I of meiosis B. Recombination

On which organs glucagon and insulin act, Q. What are the target organs up...

Q. What are the target organs upon which glucagon and insulin act? Glucagon mainly acts upon the liver and Insulin acts generally upon all cells. Both also act upon the adipose

Define the chemical equation of the formation of bicarbonate, Q. What is th...

Q. What is the chemical equation of the formation of bicarbonate from water and carbon dioxide? What is the enzyme that catalyzes this reaction? The chemical equation of the ch

Structure of the pancreas, Describe the structure of the pancreas. How is t...

Describe the structure of the pancreas. How is the pancreas modified to carry out its various functions? How does the human pancreas compare to that of the fetal pig?

Explain barrier techniques - personal protective equipment, Q. Explain Barr...

Q. Explain Barrier Techniques - Personal Protective Equipment? The use of personal protective equipment (PPE) - clothing, masks, eyewear, and gloves - is part of routine dental

What is a homologue, Single chromosome of a pair is known as homologue.In H...

Single chromosome of a pair is known as homologue.In Homologous pair two identical chromosomes are there. Each one chromosome in a Homologous pair is known as Homologue.

Define vitamins b12 deficiency in vegans, Define Vitamins B 12 Deficiency ...

Define Vitamins B 12 Deficiency in Vegans? Because plants do not synthesize vitamin B 12 , individuals who consume diets completely free of animal products (vegan diets) are a

Microscopy, how to identify in contaminants and aldultrants in pure ingredi...

how to identify in contaminants and aldultrants in pure ingredients

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