ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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animal
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plant
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bacteria
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fungus
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Detailed explanation-1: -Many heterotrophic bacteria live in the soil and fix significant levels of nitrogen without the direct interaction with other organisms. Examples of this type of nitrogen-fixing bacteria include species of Azotobacter, Bacillus, Clostridium, and Klebsiella.
Detailed explanation-2: -Rhizobia are nitrogen-fixing bacteria that exist in symbiotic relationships with the root nodules of leguminous plants. Symbiotic bacteria require a plant host since they cannot fix nitrogen; rhizobia are important nitrogen suppliers.
Detailed explanation-3: -Nitrogen fixation takes place in a wide variety of bacteria, the best known of which is rhizobium which is found in nodules on the roots of leguminous plants such as peas, beans, soya and clover.