Multiple choice

Plants and animals depend on each other for exchange of _______ and ______ from air.

  1. oxygen; carbon dioxide

  2. oxygen; nitrogen

  3. carbon dioxide; water

  4. carbon dioxide; nitrogen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The plants and animals depend on each other for exchange of oxygen and carbon dioxide from air. Plants use up large amounts of carbon dioxide and give out oxygen during photosynthesis and hence they help to maintain the level of gases in the air. 

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