The first fossilized eukaryotes date to about how many years ago?
A) 3.8 billion
B) 1.8 billion
C) 2.1 billion
D) 1 million
E) 6,000
Correct Answer:
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Q13: Mitochondria were incorporated into eukaryotes after chloroplasts.
Q14: Four of the five features below are
Q15: Metabolism may have begun when _ within
Q16: What compound served to contain interacting organic
Q17: The first O2 producing organisms were probably
Q19: Cyanobacteria are ultimately responsible for the ozone
Q20: Four of the five answers represent likely
Q21: While it is very difficult to find
Q22: Chloroplasts _.
A)evolved from cyanobacteria
B)have been found as
Q23: Oxygen released by _ accumulated in early
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