Name two organisms each that fix nitrogen symbiotically and symbiotically.
Nonsymbiotic or symbiotically nitrogen fixers are free-living bacteria that include Azotobacter and Bacillus. Rhizobium is an example of a symbiotic nitrogen fixer. Rhizobium is an aerobic bacterium. Also, Azolla and the blue-green alga Anabaena azollae are in symbiotic relationships.
