Cyanobacteria like Anabaena and Nostoc help convert atmospheric nitrogen into plant-usable forms.
Cyanobacteria such as Anabaena and Nostoc are known for their ability to fix atmospheric nitrogen into usable forms for plants, enhancing soil fertility.
(b) Order of the differential equation: $ 5x^3 \frac{d^3y}{dx^3} - 3\left(\frac{dy}{dx}\right)^2 + \left(\frac{d^2y}{dx^2}\right)^4 + y = 0 $