How are secondary metabolites useful to human welfare? Give two examples of it.</h2></div>

The biofertilizer present in the roots of legumes is</h2></div>

Waste water treatment generates a large amount of sludge, which can be treated by</h2></div>

Biogas is produced by:</h2></div>

Fertilizers applied to crop plants, pollute</h2></div>

Azolla gives a good biofertilizer when mixed with</h2></div>

Who discovered the full potential of an antibiotic?

The flour of idli and dosa is made by the use of which microbe?</h2></div>