AIPMT PRELIMS 2007 Botany Nitrogen Fixation MCQ Question
Which one of the following statements is correct?
Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil
At present it is not possible to grow maize without chemical fertilizers
Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
Correct Answer
Detailed Explanation
Excessive use of chemical fertilizers can lead to nutrient runoff into water bodies, causing eutrophication, which depletes oxygen and harms aquatic life.
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