Question 1 - Past Year - 2 Mark Questions - Chapter 15 Class 10 - Our Environment

With the help of an example of a food chain, prove that the flow of energy in the biosphere in unidirectional.

Answer:

The above example explained that:

•  At each trophic level only 10% of the energy is passed on to the next and the rest is either utilized for its own metabolic activities or is lost in the environment as heat. 
• Lost energy is not returned to the previous level or to the solar input.