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

Red pigment $(Leghaemoglobin)$ having affinity for oxygen is present in the roots of

Which one of the following can utilize molecular nitrogen $(N_2)$ as a nutrient for growth?

The bacteria found in the root nodules of the family $Leguminosae$ are:

Select the correct statements from the given:
$(a)$ Nitrogenase is a heterodimeric protein.
$(b)$ Root hairs curl by action of nitrogenase and plant 'nod factors'.
$(c)$ During symbiotic $N_2$ fixation,$ATP$ is provided by the legume plant.

Explain the stages of root nodule formation.