Question

pesticides are poisonous chemicals used to kill pests in a field do you believe it can anyhow enter the food chain and harm human beings give reason

Answer 1

yes, it enter into the the food chain by the herbivores because they eat plants and the plants contains pesticides.
so, the plant eating animals are eaten by the next level animals, thus humans eat that animals and at last the humans also harmed by it.

Answer 2

yes it is completely harmful for us . the plant is first level from where every organisms takes food.men is also eats plants which contain harmful pesticides which lead to the many severe disease. the bio magnification at every trophic level is increasing which ultimately lead to the distruction of human health