Secondary treatment of the sewage is called biological treatment. Justify the statement and explain the process.</h2&…

Why does 'Swiss Cheese' develop large holes?</h2></div>

The fixation of free nitrogen from the air in the nodules of roots of leguminous plants is done by symbiotic bacteria&lt…

In paddy fields, cyanobacteria serve as an important bio-fertiliser.

In biogas plant which group of bacteria is found?</h2></div>

Choose the correct answers from the alternatives given.<br> A free-living bacterium capable of fixing nit…

Which of the following crop has been developed by genetic engineering in India?

Which of the following is the container where fermentation is carried out?