Why are bio-fertilizers preferred over chemical fertilizers?</h2></div>

Waksman got Nobel Prize for his discovery of</h2></div>

<i>Azolla</i> is used as a biofertilizer, because it</h2></div>

<i>Rhizobium </i>fixes atmospheric _____________</h2></div>

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

Which bacterium is used extensively as biopesticide?</h2></div>

Which of the following statements is incorrect regarding beer?

<i></i><span>A legume having symbiotic association with two nitrogen fixing bacteria (</sp…