The appearance of eukaryotes may have been delayed until more _____ accumulated in Earth's atmosphere.
A) oxygen
B) nitrogen
C) carbon
D) sulfur
Correct Answer:
Verified
Q1: Why did it take so long for
Q1: You are looking at the side of
Q3: At which labeled point in the graph
Q6: The oldest fossils of terrestrial animals are
Q7: Which of the following is not documented
Q10: Which of the following is an example
Q11: The leg bones of the first tetrapod
Q16: Why is the fossil record incomplete?
A) Transitional
Q18: The first eukaryotes evolved approximately _ years
Q20: The Cambrian explosion _.
A) caused a lack
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