O Level Biology MCQs – Certification Test 1488

Molecular Biology Quiz (Question 1488) – App & e-Book Download

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MCQ 1488: Water molecule (H₂O) is split into hydrogen (H₂) and oxygen (O₂) when:

larynx is lowered, glottis is open
larynx is lowered and the windpipe is opened
larynx is raised and epiglottis blocks glottis
larynx is raised and pharynx is shut

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O Level Biology Quiz App & e-Book – Molecular Biology Certification Guide

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