What is biomagnifications? Name two heavy metals which, when magnified resulted in diseases in humans.

Chemicals, pesticides and heavy metals move up the food chain, get into aquatic bodies and are eaten by organisms like fishes which are in turn eaten by hawks/eagles. This process where the chemical enters the food chain and increase in concentration with increasing trophic level is known as biological magnification.

Heavy metals that result in diseases when magnified are mercury, cadmium, copper, lead etc.