Which of the following is a free-living nitro | vedclass

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(A) The correct answer is $A$. $Azospirillum$ is a free-living bacterium that lives in the soil and fixes atmospheric nitrogen. $Rhizobium$ is a symbi

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Azospirillum

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(A) The correct answer is $A$. $Azospirillum$ is a free-living bacterium that lives in the soil and fixes atmospheric nitrogen. $Rhizobium$ is a symbiotic bacterium that lives in the root nodules of leguminous plants. $Lactobacillus$ is used in the production of curd from milk. $Pseudomonas$ is generally a soil bacterium involved in decomposition and denitrification,not primarily known as a free-living nitrogen fixer in the context of biofertilizers.

Which of the following is a free-living nitrogen-fixing bacterium?

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