Which of the following is usually not an air - pollutant? 

Transportation of food in plants takes place through:

Science of the study of preserved remains or traces of animals, plants, and other organisms from the remote past is called ________.

Is it a small quantity of additives to keep tomato chutney fresh for longer? 

Why put a wooden handle in the kettle?

Bleaching powder contains ______ bleaching agent.

A device, which is used in our TV set, computer, radio set for storing the electric charge, is