Related Questions
Alnus trees are known to have root nodules containing a nitrogen-fixing microorganism. Identify this microorganism.
Rhizobium
Frankia
Anabaena
Clostridium
The nitrogen-fixing nodules found on the roots of Alnus are formed by:
A bacteria of the genus Frankia
A fungus of the genus Glomus
A cyanobacterium of the genus Nostoc
A protozoan of the genus Amoeba
