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The amount of oxygen in the air is kept roughly constant by the process called. 1)respiration 2) photosynthesis 3) osmosis
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The amount of oxygen in the air is kept roughly constant by the process called. 1)respiration 2) photosynthesis 3) osmosis

User Madhur Maurya
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Answer:

photosynthesis

Step-by-step explanation:

User Aksel Gresvig
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