How do rhizobium bacteria increase the fertility of soil?</h2></div>

Give scientific reasons.<div><br> The use of mutant strains has been increased in industrial microbiology.&l…

Which of the following is not used as a biopesticide?</h2></div>

Biofertiliser for Soya bean crop is</h2></div>

The antibiotic chloromycetin is obtained from </h2></div>

<i>Bacillus thuringiensis</i> is used to control</h2></div>

Which of the following is widely used as a successful biofertiliser in Indian rice fields?</h2></div>

Broad-spectrum antibiotics can kill only a small number of pathogens.