How important is is oxygen to the living things?
A. It is important since we can live without it.
B. It is important since it is used in the process of photosynthesis.
C. It is important since we cannot produce carbon dioxide without it.
D. It is important since it is used by our cells in the process of respiration.
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Answer:
D.
Explanation:
that is correct:) hope this help
Answer:
A.
Explanation:
Human life can exist only in the presence of oxygen.
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