Question

Which one of the following statements is correct? (1)Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants (2)Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil (3)At present,it is not possible to grow maize without chemical fertilizers (4)Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies

Answer 1

Answer:

4)extensive use of chemical fertilizers lead to eutrophication of nearby water bodies

Explanation:

these fertilizers increase nutrients like phosphate and nitrate in water bodies which leads to excessive growth of living organisms hence eutrophication occurs