$Frankia$ is free-living in soil,but as symbionts,can fix atmospheric nitrogen.

Leghemoglobin is .....

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?

What type of bacteria are $Rhizobium$ and $Frankia$?

Quite often,pulse crops are not manured with nitrogenous fertilizers. This is because:

Symbiotic nitrogen-fixing bacterium is . . . . . . .