It is speculated that one of the first kinds of organic molecules formed on primitive Earth was
A) amino acid.
B) ammonia.
C) oxygen.
D) protein.
Correct Answer:
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Q10: All of the following characteristics are necessary
Q11: If oxygen had been present at the
Q12: Biogenesis states that life begins with
A) oceans.
B)
Q13: Stanley Miller's experiment
A) proved the origin of
Q14: If the first living things were autotrophs,
Q16: Different scientists have speculated about how the
Q17: To produce organic matter from inorganic matter,
Q18: Currently _ is/are thought to have been
Q19: If the first primitive cells on Earth
Q20: According to Oparin's theory of the origin
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