How do respiration and photosynthesis cycle oxygen through an ecosystem?
Select all that apply.
Respiration uses oxygen and releases carbon dioxide.
Photosynthesis uses carbon dioxide and produces oxygen.
Respiration uses carbon dioxide and releases oxygen as a by-product.
Oxygen is released as a by-product of photosynthesis.
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Respiration uses oxygen and releases carbon dioxide.
Photosynthesis uses carbon dioxide and produces oxygen.
Respiration uses carbon dioxide and releases oxygen as a by-product.
Oxygen is released as a by-product of photosynthesis.
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