Search any question & find its solution
Question:
Answered & Verified by Expert
Observe figure and answer the following questions.
(i) What ecological term is used to describe the DDTaccumulation at different trophic levels?
(ii) List any one effect of DDT accumulation on birds.
(iii) Will DDT accumulation lead to eutrophication?
(iv) Does it affect the BOD?
(v) Name disease caused by accumulation of any heavy metal.
(i) What ecological term is used to describe the DDTaccumulation at different trophic levels?
(ii) List any one effect of DDT accumulation on birds.
(iii) Will DDT accumulation lead to eutrophication?
(iv) Does it affect the BOD?
(v) Name disease caused by accumulation of any heavy metal.
Solution:
2135 Upvotes
Verified Answer
(i) Biomagnification is the ecological term used to describe the DDT accumulation at different trophic levels.
(ii) Calcium metabolism in birds is disturbed by high concentrations of DDT, which causes thinning of egg shell and their breaking prematurely, eventually causing decline in bird populations.
(iii) DDT accumulation can lead to eutrophication as well.
(iv) DDT increases the BOD which results in a decrease in dissolved oxygen in the water body.
(v) Minamata disease is caused by eating fish that has accumulated mercury, a heavy metal. It is characterised by diarrhoea, haemolysis, numbness, deafness, mental derangement, meningitis and death.
(ii) Calcium metabolism in birds is disturbed by high concentrations of DDT, which causes thinning of egg shell and their breaking prematurely, eventually causing decline in bird populations.
(iii) DDT accumulation can lead to eutrophication as well.
(iv) DDT increases the BOD which results in a decrease in dissolved oxygen in the water body.
(v) Minamata disease is caused by eating fish that has accumulated mercury, a heavy metal. It is characterised by diarrhoea, haemolysis, numbness, deafness, mental derangement, meningitis and death.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.