One critical requirement for life to arise on Earth was time for:
A) the atmospheric temperature to increase sufficiently.
B) molecules to accumulate and react with one another.
C) the Earth's various climates to stabilize.
D) the salinity of the oceans to stabilize.
E) the ozone layer to form, so that the level of ultraviolet radiation was reduced.
Correct Answer:
Verified
Q3: The hypothesis that organic molecules formed near
Q4: Which of the following is not one
Q5: Multicellular eukaryotes arose about:
A) 3.8 billion years
Q6: The most significant outcome of the Miller
Q7: Chemical evolution:
A) cannot be investigated experimentally.
B) was
Q9: Which of the following gases was not
Q10: Presently, it is thought that organic polymers
Q11: The approximate age of the Earth is:
A)
Q12: The hypothesis that organic molecules formed near
Q13: The Earth's early atmosphere was probably strongly:
A)
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