alleryHigh DDT in birds disturbs calcium metabolism and causes:
AThinner eggshells
BMuch larger eggs
CBrighter feathers
DLonger beaks
Answer & Solution
Correct answer: A. Thinner eggshells
1. Calcium is needed to build eggshells.
2. DDT upsets calcium use in the bird.
3. Eggshells thin and break early, so populations fall.
_Source: syllabus Biology, Chapter 16, Environmental Issues._
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