Most active nitrogen fixing blue-green algae of rice fields is</h2></div>

Which one of the following microorganisms forms a symbiotic association with plants and helps them in their nutrition?&l…

Chemicals that inhibit the growth of other harmful microbes by affecting their life processes are called</h2></…

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

(i) Why do farmers prefer biofertilizers to chemical fertilizers these days? Explain.<br> (ii) How do <i>Ana…

Biogas plants are more often built in urban areas.

Which one of the micro-organism is used for production of citric acid in industries?<br> </h2></div>

Besides paddy fields, cyanobacteria are also found inside vegetative part of : </h2></div>