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A prokaryotic autotrophic nitrogen fixin...

A prokaryotic autotrophic nitrogen fixing symbiont is found in

A

Alnus

B

Cycas

C

Cicer

D

Pisum

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Cicer and Pisum belong to family Leguminosae , where there is association of there is association of free living bacteria Rhizobium .In Alnus there is association of free living bacteria Frankia. In Cycas there is association of Cyanobacteria which are prokayotic autorophic nitrogen fixing organisms .
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