Biology 2014 JAMB Past Questions - Question 34: Which of the following is a nitrogen-fixing blue-green algae soil?

Correct Answer

D

Explanation

It is found living freely in the soil where it traps free nitrogen in the soil to synthesize its own protein. Rhizobium is a nitrogen fixing bacterium that lives in mutualistic association with roots of leguminous plants. It absorbs soil nitrogen and uses it to produce soil nitrate which the roots of plants absorb to synthesize protein Nitroso monas is a nitrifying bacterium that oxidize or converts oxides of nitrogen to form nitrite to release energy. clostridium and azotobacterial are bacteria that live freely in the soil the trap soil nitrogen to form nitrate