IGCSE O Level Biology Certification Exam Tests
IGCSE O Level Biology Practice Test 339
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MCQ 1691: In humans, the sensitivity of respiratory diseases, eyes, and air passages is experienced due to
MCQ 1692: PH (power of Hydrogen) of about 8 is characteristic of
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MCQ 1694: Fish can come to the surface of the water for air-breathing in waters of
MCQ 1695: Carboxyhemoglobin is of
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