Sewage water is purified by</h2></div>

Which of the following shows a modern technology measure used to preserve and conserve the environment?</h2></d…

Which wood is more suitable for fuel?

Antibiotic pencillin is made from_______.</h2></div>

A farmer had been using a particular insecticide for a long time. What consequences will it have on Insect population?&l…

Observe the following figures and answer the questions :<br> (a) Identify the process shown in the figure.&nbs…

What is the role of micro-organism in increasing the fertility of the soil?<br> </h2></div>

Raw material used in formation of producer gas is</h2></div>