Before DNA, ____ likely served as the genetic material.
A) carbohydrate
B) lipid
C) protein
D) RNA
E) free nucleotides
Correct Answer:
Verified
Q25: The primitive Earth's atmosphere contained very little
Q26: Four of the five answers below were
Q27: Life probably never would have emerged if
Q28: What has been detected in meteorites that
Q29: Experiments like those first performed by Miller
Q31: Astrobiologists believe _ is an essential component
Q32: A rise in oxygen in Earth's air
Q33: The oldest multicellular eukaryote, a(n) _, can
Q34: Which process or element was present first?
A)aerobic
Q35: What structure may have acted as a
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