OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Bacteria fix nitrogen on plant roots. Plant roots provide sugar to bacteria. This is an example of
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mutualism
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parasitism
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commensalism
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competition
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Explanation:
Detailed explanation-1: -In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N2 for plant nutrition, receiving carbohydrates in exchange.
Detailed explanation-2: -Some plants contain nitrogen-fixing bacteria Rhizobium in their root nodules. This relationship is known as mutualism.
Detailed explanation-3: -Rhizobium is a facultative anaerobe – it can grow without oxygen. It can fix nitrogen only in anaerobic conditions. It is usually considered to be an obligate mutualist when fixing nitrogen in the root nodule.
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