Multiple Choice
Which of the following is a highly speculative issue about the early origin of life?
A) Sufficient evidence exists that RNA might have been the first informational molecule.
B) Amino acids could have originated by Krebs cycle acids complexed to a dinucleotide.
C) Bacterial redox metabolism can be evidenced through 34S/32S ratios from 3.47 Gyr ago.
D) Ancestors of methanogens using H2 and CO2 to make CH4 and H2O evolved early.
E) Panspermia, life forms originated elsewhere, were seeded on Earth by meteorites.
Correct Answer:
Verified
Correct Answer:
Verified
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Q4: A clade could best be described as
Q5: Molecular clocks use genes that<br>A) code for
Q6: Which of the following is NOT used
Q7: Which of the following would be considered
Q9: Taxonomy can be defined as the<br>A) classifying
Q10: Explain how studying the evolutionary rate of
Q11: Oparin at Moscow University, Miller and Urey
Q12: All of the following are examples of
Q13: The ancestral organism that gave rise to