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Question

Nitrogen fixer soil organisms belong to

A
Mosses
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B
Bacteria
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C
Green Algae
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D
Soil Fungi
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Solution

The correct option is B Bacteria
The atmospheric nitrogen is not available for the plants. By the process of nitrogen fixation, atmospheric nitrogen is converted into ammonia and made available for plants. The nitrogen fixer soil organisms belong to bacteria. Examples of free-living nitrogen-fixing bacteria include cyanobacteria, Azotobacter, Clostridium. Examples of symbiotic nitrogen-fixing bacteria include Rhizobium, Bradyrhizobium.
Thus, the correct answer is 'Bacteria.'

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