IGCSE O Level Biology MCQs – Practice Test 9 (Chapter 7)
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MCQ 41: Miscarriages in women may be due to intake of:
MCQ 42: Nitrates (NO3-1) and phosphates (PO4-3) reach underground water with:
MCQ 43: Central heating systems can be run through:
MCQ 44: Loss of control of hand and feet occurs due to:
MCQ 45: Metals is produced as waste in industries like:
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