Assertion :Nitrogen-fixing bacteria in legume root nodules survive in oxygen-depleted cells of nodules Reason: Leghaemolobin completely removes oxygen from the nodule cells

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Assertion:
Nitrogen-fixing bacteria in legume root nodules survive in oxygen-depleted cells of nodules.
Reason:

Leghaemolobin completely removes oxygen from the nodule cells.
Assertion is correct but Reason is incorrect.

Rhizobium species live in symbiotic association in the root nodules of leguminous plants like,pea,gram, etc. In the soil the bacteria cannot fix nitrogen.After entering the legume root, the bacterium induces cell membrane. A pink-red pigment called leghaemologbin lines the membrane and protect the bacteriods from the oxygen.

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