An example of a symbiotic nitrogen fixer is – McqOptions

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1.	An example of a symbiotic nitrogen fixer is
A.	<i>Azotobacter</i>
B.	<i>Beijerinckia</i>
C.	<i>Clostridium</i>
D.	<i>Rhizobium </i>
Answer» E.

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