Write two names for each of the following

cbse
mineralnutrition

#1

Write two names for each of the following
(i) Free-living nitrogen fixing cyanobacteria. (ii) Free-living aerobic nitrogen fixing bacteria.
(iii) Symbiotic nitrogen fixing bacteria.


#2

(i) Nostoc, Anabaena (ii) Azotobacter, Beijerinckia (iii) Frankia, Rhizobium