Free O Level Biology Study App – Pesticides: O Level Biology MCQs e-Book PDF

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O Level Biology MCQs – Certification Test 1710

Pesticides: O Level Biology MCQs (Question 1710) – Study App & e-Book Download

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MCQ 1710: Substances which can remain in the soil for many years are known as:

  1. microorganisms
  2. insecticides
  3. dichloro-triphenyl dichloroethane
  4. dichloro-diphenyl trichloroethane

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