Thearly atmosphere
A) was essentially the same as occurs now.
B) was changed drastically by the liberation of oxygen following the evolution of photosynthesis.
C) was characterized by high concentrations of oxygen and ozone.
D) was characterized by high concentrations of inert gases before the evolution of living organisms.
E) was so dense that life could not evolve.
Correct Answer:
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Q50: During thArchaea era, divergencof prokaryotes leto all
Q51: Bacteria
A)are diploid organisms.
B)produce gametes.
C)have a life cycle
Q52: Bacteria can obtain their fooby
A)photosynthesis.
B)breaking down chemical
Q53: Prokaryotic cells arlikely to bfound
A)in and on
Q54: Which of thfollowing statements is NOT characteristic
Q56: In a eukaryotic cell, _ arresponsiblfor transformation
Q57: Prokaryotes may NOT be
A)photoheterotrophs.
B)chemoheterotrophs.
C)chemophotoautrophs.
D)chemoautotrophs.
E)photoautotrophs.
Q58: Which of thfollowing organelles arendosymbionts of eukaryotic
Q59: In a eukaryotic cell, _ arresponsiblfor production
Q60: Tholdest eukaryotidentifiein fossil records is thought to
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