Given below is the flow chart of sewage treatment. Identify A, B, C and D and select the correct option. <br…

Biopesticides are:</h2></div>

The primary treatment of removal of:</h2></div>

What are biofertilisers? Give two examples. </h2></div>

<span>What makes cyanobacteria agriculturally important?</span></h2></div>

Methanogenic bacteria are not found in</h2></div>

The following diagram represents ________

Which is useful as biological control ?</h2></div>