How many organisms In the list given below are N2 fixer autotrophs? Azotobacter, Chromobum, Azospirillum, Rhodospirillum, Rhizobium, Nitrobacter, Aulosira, Nostoc, Osallatona
Six
Four
Three
Five
A
Three
B
Four
C
Five
D
Six
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Solution
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Nitrogen-fixing bacteria are capable of fixing atmospheric nitrogen to inorganic substances usable by plants. Example from the given list are Azetobactor, Azospirillum, Rhizobium, Nitrobactor and Nostoc.
So the correct answer is 'five'.
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