Write the main constituents of biogas.</h2></div>

Primary treatment involves filtration and distillation.

Which one of the following is not used in organic farming?</h2></div>

Secondary treatment is also known as ________________.<span><br> </span></h2></div>

<i>Monascus purpureus</i> is a yeast used commercially in the production of</h2></div>

A third generation pesticide is</h2></div>

Which of the following is not true regarding biological farming?

Name the enzyme produced by Streptococcus bacterium. Explain its importance in medical science.</h2></div>