With reference to the root nodules shown in the following diagram,select the correct option.

  • A
    Galls containing Anabaena
  • B
    Root nodules having Rhizobium phaseoli
  • C
    Root nodules having Rhizobium leguminosarum
  • D
    Galls containing Azospirillum

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The symbiotic nitrogen-fixing bacteria present in root nodules of legumes belong to the genus

Rhizobium lives symbiotically with root nodules and fixes atmospheric nitrogen. It provides nitrogenous compounds to the host and in turn takes food from the host. This food taken by the bacterium is:

Nodules with nitrogen-fixing bacteria are present in

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