The Precambrian-Cambrian boundary is
A) A point that separates reduction environments from oxidation environments
B) The separation point between prokaryotes and eukaryotes
C) A point of dramatically increased fossilization, although it is likely that many animal groups existed before this time
D) The shift-over from plants to animal life
Correct Answer:
Verified
Q33: Water has which of the following important
Q43: The fact that nucleic acids are very
Q45: The ancestral protocells
A)may have contained RNA or
Q47: A molecule of RNA that has enzymatic
Q48: Prokaryotic cells are represented by fossils that
Q50: Amino acids are linked together to form
Q52: An alternative environment to the "hot dilute
Q55: The most important of the energy-storing carbohydrate
Q56: The first eukaryotic cells probably arose about
Q59: Heating dry mixtures of amino acids and
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