IGCSE O Level Biology MCQs – Practice Test 8 (Chapter 7)
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MCQ 36: High concentrations of carbon monoxide (CO):
MCQ 37: Cadmium is an example of:
MCQ 38: Fossil fuels and minerals are examples of:
MCQ 39: Over a period of time, mosquitoes have developed resistance to:
MCQ 40: Which one is a characteristic of fossil fuels:
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