Which of the following is associated with biological nitrogen fixation?

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Blue-green algae. Biological Nitrogen Fixation (BNF) is the term used for a process in which nitrogen gas (N2) from the atmosphere is incorporated into the tissue of certain plants. Blue Green Algae (Cyanobacteria) are a special group of prokaryotes. BGA are widely distributed all over the earth. While fixing carbon from CO2, certain BGA can fix nitrogen (N2) from the atmosphere, and are called nitrogen-fixing BGA, including free living and symbiotic forms.

Which of the following is associated with biological nitrogen fixation?

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