Biologyhard · Past Paper
What is the phenotypic effect of 'Biological Magnification' on predatory birds like eagles in the past?
AFaster flight
BThinning of eggshells
CIncreased beak size
DBrighter feathers
✓ Correct Answer: B — Thinning of eggshells
DDT accumulation led to calcium metabolism interference, causing thin eggshells that broke before hatching.
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