IGCSE O Level Biology Exam MCQs – Practice Test 4 (Chapter 6)
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MCQ 16: Carbon dioxide (CO2) is released in the atmosphere through:
MCQ 17: In context to ecology ,hydrophytes may be:
MCQ 18: In order to float, water weeds have:
MCQ 19: Due to osmotic pressure in marine fish, kidneys:
MCQ 20: Which is true in case of xerophytes:
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