ScienceOur EnvironmentEnglish Medium 150 questions
Practice questions (150)
Question 1 of 150
Which of these best summarizes the ozone-oxygen relationship described in the chapter? atmosphere
○ O2 and O3 are the same molecule with different names
O2 is essential for life while O3 (ozone) is poisonous at ground level but protective in the upper
○ O3 is essential for breathing while O2 is a poison
○ Neither O2 nor O3 has any biological significance
Show explanation
The chapter distinguishes O2, essential for aerobic life, from ozone (O3), which is poisonous but serves a protective function high in the atmosphere. — Examisthan.com
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