question_answer

Certain plants have knob like structure, which helps in converting atmospheric nitrogen in nitrate or nitrite, to increase the nitrogen content of the soil. Such plants are called leguminous plants. These plants contain bacteria in its roots, which helps in this work. Which one of the following bacteria helps in doing this work?

A)  Rhizobium bacteria

B)  Bacillus

C)  Cocus

D)  Salmonella typhi

E)  None of these