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  4. Which of the following is a symbiotic nitrogen fixer?

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Q. Which of the following is a symbiotic nitrogen fixer?

AIPMTAIPMT 2009Biological Classification

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.