Q. 35.0( 4 Votes )

Choose the forms A. I and II

B. II and III

C. III and IV

D. I and IV

Answer :

Most plants absorb nitrogen in the form of nitrates, nitrites and urea. They cannot use up atmospheric nitrogen as it is un-reactive. This nitrogen needs to be converted into absorbable forms by certain nitrogen-fixing bacteria so that they can be taken up by plants.

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