Multiple Choice
The concentration of oxygen in the atmosphere has been near or above its current value for the past
A) 200 million years
B) 542 million years
C) 65 million years
D) 360 million years
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q66: The earliest Homo sapiens appeared about<br>A) 25
Q67: Meteor add approximately what mass to the
Q68: The most well-known impact crater in North
Q69: The Permian extinction event was mostly likely
Q70: Under what conditions will prebiotic molecules NOT
Q72: Currently, the strongest evidence for microfossils dates
Q73: What was the approximate diameter of the
Q74: Why do we think that RNA was
Q75: Modern mammals are descendants of<br>A) birds that
Q76: The LEAST significant evolutionary changes in human