LIFE SCIENCE

Detailed explanation-1: -Thus, the correct answer is option (B), ‘Ammonia’. Q. The first stable product of fixation of atmospheric nitrogen in leguminous plants is : Q.

Detailed explanation-2: -During the conversion of nitrogen cyano bacteria will first convert nitrogen into ammonia and ammonium, during the nitrogen fixation process. Plants can use ammonia as a nitrogen source. After ammonium fixation, the ammonia and ammonium that is formed will be transferred further, during the nitrification process.

Detailed explanation-3: -Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by a nitrogenase enzyme.