Explain how harmful chemicals enter our bodies.

Accumulation of harmful chemicals in our bodies can be avoided. Explain how this can be achieved ?

A farmer is growing a crop regularly in his field. He uses chemical fertilizers, pesticides, organic manure as well as bio-fertilizers. Very close to his field is a factory which emits smoke as a by product. There is also a huge lake in the nearby area. Which of these is a way to prevent accumulation of harmful chemicals in our bodies ?

Assertion: Food chain is responsible for the entry of harmful chemicals in our bodies. Reason: The length and complexity of food chains vary greatly.

Harmful chemical present in tobacco is

Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.

Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.

which ,among grass , goat , tiger and vulture , in a food chain , will have the maximum concentration of harmful chemicals in its body due to contamination of pesticides in the soil ?