Question:
What two gases were most abundant on early Earth? A) O2 and CO2 B) N2 and H2 C) CO2 and H2 D) CO2 and N2
Author: Maram OmarAnswer:
C) CO2 and H2
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Author
Maram Omar
Answer:
0 / 5 Â (0 ratings)
1 answer(s) in total