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Question

The bacteria in the root nodules of leguminous plants convert atmospheric _______ into its compounds.

A
oxygen
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B
nitrogen
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C
sulphur
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D
sodium
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Solution

The correct option is B nitrogen
The root nodules in leguminous plants like peas, fenugreek, beans, etc., contain useful bacteria that convert atmospheric nitrogen into its compounds. This helps in increasing the soil fertility. Since the nitrogen content in the soil is increased, the plant is able to produce more proteins. Rhizobium, Nostoc and Anabaena are examples of nitrogen fixing microorganisms.

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