Answer:
True DDT harmful to birds because it prevented them from laying eggs.
Step-by-step explanation:
- True,DDT harmful to birds because it prevented them from laying eggs.
- Dichlorodiphenyltrichloroethane and its metabolite Dichlorodiphenyldichloroethylene change the hormones, that alter the calcium metabolism and affect the reproduction and growth of birds exposed to it.
- They suffer from reproductive collapse as their eggs needed sufficient calcium.
- DDT weakened and thinned eggs of birds that result in the death of their embryo.