IGCSE O Level Biology Practice Tests
IGCSE O Level Biology Online Tests
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The MCQ: Profuse growth of algae occurs due to; "Atmospheric Pollution" App Download (Free) with answers hydrogen sulphide in water, nitrates and phosphates in water, carbon dioxide in water and chlorine in water to study online IGCSE GCSE courses. Study atmospheric pollution quiz questions, download Google eBook (Free Sample) for two year online colleges.
MCQ 1: Profuse growth of algae occurs due to
MCQ 2: Sulfur dioxide (SO2) may be reduced in air, if
MCQ 3: Nitrates (NO3-1) and phosphates (PO4-3) reach underground water with
MCQ 4: Loss of control of hand and feet occurs due to
MCQ 5: If lead accumulation occurs for long in the body, the outcomes may include
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