Question

Population of birds decline significantly in an area where DDT has been used because:

• A. birds stop laying eggs
• B. eggs dont hatch
• C. eggs are eaten by predators
• D. birds can't make nests

Answer 1

The correct option is B eggs dont hatch

Accumulation of DDT leads to a process called biomagnification in birds. This leads to their calcium metabolism getting impaired which results in thinning of egg shells and hence the eggs don't hatch, declining the bird population.