Question
Biology Question on biological classification
Which of the following is a symbiotic nitrogen fixer?
A
Azotobacter
B
Frankia
C
Azolla
D
Glomus
Answer
Frankia
Explanation
Solution
Frankia, is a nitrogen fixing symbiotic bacteria. It induces root nodules just like Rhizobium. It is associated symbiotically with the root nodules of several non-legume plants like Casuarina, Alnus, Rubus etc. It cannot fix nitrogen in free state.