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What is meant by biological nitrogen fixation Explain the process of biological nitrogen fixation.Give role of leghemoglobin in nitrogen fixation

dear student,
Firstly Biological nitrogen fixation is a term used for a process in which N2 (nitrogen)from the atmosphere is incorporated and converted into usable forms for the plants. the leguminous plants have nodules in their roots which has the presence of nitrogen fixing bacteria like rhizobium. please have a look at this schematic diagram.

talking about leg-haemoglobin:-
1. The nodules are reddish, pink in colour due to the role of leg-haemoglobin.
2. this pigment also acts as an oxygen scavenger that protect the enzyme present in the nodules of these plants. 

hope it helps!
regards.

 

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okay, it's a long one :

Biological nitrogen fixation is a term used for a process in which N2 (nitrogen)from the atmosphere is incorporated into the tissues of certain plants.
In legume plants, the roots contain small globular structures known as Nodules, hence the roots are known as Nodules.T he nodules are reddish, pink in color due to the role of leg-haemoglobin.T he nodules have rod-shaped bacteria RHIZOBIUM which helps in fixing nitrogen from the atmosphere and converts it into ammonia or nitrates and supplies to the plant . The plant, in turn, provides food and shelter to the bacteria they mutually benefit each other, this processs is the symbiosis 
EX) groundnut,
 peas 
HOPE THAT HELPED 

 
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In first image you have enough information about the first two questions you have ask .....i hope u will statisfy with my answer....

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