Where does the oxygen that keeps us alive
come from?
a) Carbon dioxide
(b) Carbonates absorbed from soil
c. Oxides of minerals
d. Water
Answers
Answered by
0
Answer:
tough question.
Explanation:
Actually it comes from plants, mostly aquatic ones which perform photosynthesis.
So, I would say both CO2 and water
a) and d)
Answered by
0
Answer:
The oxygen that keeps us alive came from water
D- water
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