Four of the following were likely in Earth's earliest atmosphere. Which one was not?
A) hydrogen
B) nitrogen
C) oxygen
D) carbon dioxide
E) water vapor
Correct Answer:
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Q5: The "big bang" refers to
A) an
Q11: The study of life's origins and distribution
Q11: Four of the following statement about protocells
Q12: Figure 19.3 Q13: Chemical evolution started on Earth _. Q17: Life probably would never have emerged on Q17: Miller's reaction chamber contained gases intended to Q20: The formation of amino acids under abiotic Q20: Which step in the evolution of life Q21: Choose the most appropriate statement that matches
A) after
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