O Level Biology MCQs (O Level) From Textbook

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O Level Biology MCQs – Certification Test 449

Facts about Smoking Notes (Question 449) – App & e-Book Download

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MCQ: 449

Which is true about Nicotine (C10H14N2)

  1. a carcinogenic substance
  2. makes blood clot easily
  3. makes blood dilute
  4. helps in lumen becoming narrower

Facts about Smoking Textbook Tests – O Level Biology App & eBook Notes

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O Level Biology Notes App (Android & iOS)

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