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Monica [59]
3 years ago
6

The first organisms on Earth were able to transform the carbon dioxide in the air into what essential element needed for modern

life?
A. Hydrogen

B. Helium

C. Nitrogen

D. Oxygen
Biology
2 answers:
SCORPION-xisa [38]3 years ago
8 0
D.) Oxygen, most mammals need good ol' Oxygen in order to turn glucose into energy. 
Len [333]3 years ago
4 0
D. Oxygen  
We wouldn't be here without it
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