In the 1920s, Aleksander Oparin and John Haldane each made independent proposals about the formation of life on Earth. What did they say about essential organic molecules?
A) that these could not have been made in the absence of life in the conditions on primordial Earth
B) that these could have been made in the presence of life in the conditions on primordial Earth
C) that these could have been made in the absence of life in the conditions on primordial Earth
D) that these could have been made in the absence of life in the conditions on modern Earth
Correct Answer:
Verified
Q3: How old is Earth?
A) about 4.6 million
Q12: From which of the following processes did
Q13: If an electrode is analogous to the
Q15: Which statement best describes the panspermia hypothesis?
A)Life
Q15: What are protobionts?
A) a group of abiotically
Q19: When were the oldest stromatolites formed?
A)about 2.1
Q20: If a warmed flask of water is
Q20: What is the importance of the Miller-Urey
Q21: Besides the primordial atmosphere, highly reducing conditions
Q36: What is indicated by the fact that
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