Residues in food can harm human health because the poisonous chemicals that are in the pesticide gets carried through the food chain and the highest in the food chain gets the most effect as the poison builds up To read more visit the Related Link.
no
when a food chain breaks down, the animals above will not have enough food
Decomposers must be added to any food chain or food web to form a complete food cycle.
top of the food chain
They die
When pesticides are sprayed into stagnent pools of water, either by accident or on purpose, small larvae eat the pesticide. Then it gradually travels up the food chain by predators eating their prey.
it because
This is part of an old science homework question, I think because it is higher up the food chain and secondary poisoning is exponential and also having to do with the amount of food it eats in proportion to it's body weight.
they get eaten by bigger animals.
I think what you are referring to is a food chain, It is a series of energy steps from plants to animals and more animals in the form of food.
Pesticides increase in higher trophic levels due to Bilogical magnification .