There is no factory which can manufacture a product without generating any waste. This is true of our body which is a

cellular factory too. And for other organisms as well. Wastes are generated at regular intervals from the bodies of most organisms. This raise questions like.
Where are the wastes produced?
How are they produced?

What are the substances present in them?

Does the composition vary in the same organism in different situations?

Let us understand such kind of questions.

Living beings need energy for their survival and to perform activities either building up of body material (anabolism) or its breakdown (catabolism), collectively called metabolic activities. Organisms use different substances for metabolic activities. Different products are generated as a result of these metabolic activities. Can you name different products generated by the following life processes?