Question

please!! answer my questions???

Answer 1

9. When any harmful chemical like pesticides enter in a food chain, its concentration increases gradually at each trophic level. This phenomenon is called Biological Magnification.

Answer 2

We use harmful pesticides and other chemicals to keep crop safe from diseases
The chemicals are either washed down by the soil or into the water bodies
These chemicals are taken by the plants along with water and minerals, in water bodies they are taken by aquatic plants and animals
These chemicals get accumulated in their body
As human are at top trophic level of any food chain, maximum concentration of chemicals get accumulated in their body
This process is called biological magnification