i. What ecological term is used to describe the DDT accumulation at different trophic levels?

ii. List anyone effect of DDT accumulation on birds

iii. Will DDT accumulation lead to eutrophication?

iv. Does it affect the BOD?

v. Name the disease caused by the accumulation of any heavy metal.

i) The environmental term used to describe the accumulation of DDT at different trophic levels is Biomagnification.

ii) The high concentration of DDT in birds disrupts their metabolism leading to a reduction in egg yolks and premature rupture.

iii) Yes, the accumulation of DDT leads to the naturally occurring eutrophication of the body of water due to overeating.

iv) The accumulation of DDT leads to the increased life in the body of water which in turn leads to an increase in the need for biological Oxygen.

v) Minamata Disease due to Mercury, Black Foot due to Arsenic and Itai-Itai due to Cadmium are the diseases caused by the accumulation of any heavy metal.