O Level Biology Study App | Heart: O Level Biology MCQs e-Book PDF
O Level Biology MCQs (O Level) From Textbook

O Level Biology MCQs – Certification Test 286

Heart: O Level Biology MCQs (Question 286) – App & e-Book Download

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MCQ 286: Semilunar valves are present at the bases of:

  1. pulmonary artery only
  2. aorta only
  3. pulmonary veins
  4. pulmonary artery and aorta

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