The appearance of air breathing organisms was most dependent upon:
A) the accumulation of methane gas in the atmosphere.
B) the survival of cyanobacteria on the primitive earth.
C) the accumulation of ozone in the upper atmosphere.
D) the survival of organisms around undersea thermal vents.
E) the absence of predators on the first land masses.
Correct Answer:
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Q23: Macromolecules that are capable of self-replication are:
A)
Q24: The atmospheric gas that prevents the majority
Q25: Millions of years ago, the activity of
Q26: In the process of splitting water during
Q27: One of the most significant steps in
Q29: The first organisms to release oxygen by
Q30: Experiments called in vitro evolution or directed
Q31: The theory that eukaryotic organelles originated as
Q32: The first enzymes were probably:
A) protein reproducing
Q33: The results of the experiment represented in
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