O Level Biology MCQs (O Level) From Textbook

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O Level Biology MCQs – Certification Test 1183

Herbicides: O Level Biology MCQ (Question 1183) – Learning App & e-Book Download

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MCQ: 1183

Physical, mental abnormalities and risks of cancer are increased due to

  1. dichlorophenyl trichloroethane (DDT)
  2. biochemical oxygen demand (BOD)
  3. dioxins
  4. greenhouse effect

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