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Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist. A) hydrogen B) nitrogen C) oxygen D) sulfur

Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist. A) hydrogen B) nitrogen C) oxygen D) sulfur
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Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.

A) hydrogen
B) nitrogen
C) oxygen
D) sulfur

User Simon I
by
8.9k points

2 Answers

3 votes

The correct answer is oxygen

User Navin Viswanath
by
7.9k points
2 votes
 c)oxygen is the correct answer i am very sure.
User Alex McKenzie
by
8.3k points
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