Which of thfollowing elements may havbeen precursors of modern cells?
A) anaerobic bacteria
B) prokaryotic cells
C) pseudocells
D) archaea
E) protocells
Correct Answer:
Verified
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Q30: Early photosynthetic organisms dinot produce
A)sugars.
B)oxygen.
C)lipids.
D)proteins.
E)nucleotides.
Q31: A hypothesis of thorigin of molecules of
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Q38: Stromatolites appeareabout _ years ago.
A)6,000
B)1,000,000
C)250,000,000,000
D)3,500,000,000
E)50,000,000,000
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