Question

The bio accumulation of pesticides in birds leads to

• A. Weakening of nest
• B. Egg shell thinning
• C. Failure of migration
• D. Loss of feather colour

Answer 1

Answer: (B)

Egg shell thinning

• Bioaccumulation is the gradual accumulation of substances, such as pesticides, or other chemicals in an organism. This occurs when the absorption of pesticides is faster than its excretion.
• Adverse effects of bioaccumulation include accumulation of mercury in the brain causes mercury poisoning, DDT, tetraethyllead kills organisms and the accumulation of pesticides in birds causes egg-shell thinning.
  
• Hence The bioaccumulation of pesticides in birds leads to Eggshell thinning.
• So, the correct answer is 'Eggshell thinning',