Question

In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?​ ​

Answer 1

Arranging the organisms in a food chain, we get,​

Grass → Insect → Frog → Bird

​ ​ The concentration of harmful chemicals increases with an increase in the trophic level. The accumulation of harmful chemicals such as pesticides in the living organisms, through the food chain is called biomagnification.​ ​

Hence, the concentration of harmful chemicals will be maximum in the bird, which is the highest trophic level in the given food chain.​