First slide

Water Pollution and its Control

Question

Which of the following is not true with regard to biomagnification of DDT and decline in bird population?

Easy

A

Bringing disturbance in calcium metabolism
B

Thining of egg shell
C

Premature breaking of eggs
D

DDT concentration is least in birds as it is not metabolised

Solution

The concentration of DDT is highest in the birds as it is neither metabolised not excreted.
It is increased at successive trophic levels; starts at 0.003 ppb (ppb = parts per billion) in water, it can ultimately reach 25 ppm (ppm = parts per million) in fish-eating birds, through biomagnification. High concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshell and their premature breaking, eventually causing decline in bird populations.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App