Which one is concerned the most active and efficient nitrogen fixer ?

Anabaena

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Nostoc

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Aulosira

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Trichodesmium

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Solution

The correct option is C Aulosira
Many free-living cyanobacteria perform the function of nitrogen fixation. Examples of nitrogen fixer include Anabaena, Nostoc, Aulosira and Trichodesmium. Out of all these, Aulosira fertilissima is the most active and efficient nitrogen fixer of rice field.
Thus, the correct answer is option C.

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Similar questions

Select the matched ones:

(1)Nitrosomonas - Nitrite to nitrate

(2)Thiobacillus - Denitrification

(3)Nostoc– Free - living nitrogen-fixer

(4)Azotobacter - Anaerobic nitrogen-fixer

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