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5 November, 05:19

A tree uses gas A to produce gas B. An animal uses gas B to produce gas A. What is gas B in this cycle?

A. oxygen

B. nitrogen

C. carbon dioxide

D. carbon monoxide

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Answers (2)
  1. 5 November, 06:54
    0
    A Oxygen

    Explanation:

    this is because plants use carbon dioxide to produce oxygen and humans/animals use oxygen to produce carbon dioxide.
  2. 5 November, 07:40
    0
    A plants produce oxygen and humans take it in
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