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Nitrogen fixation in root nodules of Aln...

Nitrogen fixation in root nodules of Alnus is brought about by

A

Frankia

B

Azorhizobium

C

Bradyrhizobium

D

Clostridium

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The correct Answer is:
A
Frankia, a nitroge fixing mycelial bacterium (actinomycete), is associated symobiotically with root nodules of serval non-legume plants like Alnus (Alder) Myrica, Rubus, etc.
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