Question

microbes are commonly called biological nitrogen fixers, are:
a) some kind of bacteria
b) green algae
c) both (a) and (b)
d) none of these.​

Answer 1

c) both (a) and (b)

Explanation:

rhizobium is the bacteria responsible for the above

Answer 2

Answer:

(c) both(a) and (b) is a right answer