Question
Biology Question on Nutrition
Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
A
Rhizobium
B
Frankia
C
Rhodospirillum
D
Beijerinckia
Answer
Frankia
Explanation
Solution
Frankia is a genus of nitrogen-fixing, filamentous bacteria that live in symbiosis with actinorhizal plants but this is non-leguminous. Hence nitrogen fixation in root nodules of Alnus is brought about by Frankia.