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IGCSE O Level Biology Competitive Exam: Practice Test 5 (Chapter 7)
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Chronic bronchitis and emphysema are more vulnerable to
Carboxyhemoglobin is formed if
Large gene pool enables
Use of non-fossil fuel in factory may
If water containing DDT (dichloro-diphenyl-trichloroethane: C14H9O5) is fed upon by cattle, it will
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