Multiple Choice
The most dramatic mass extinction event on Earth occurred:
A) 10,000 years ago (Pleistocene- Holocene) .
B) 65 million years ago (Cretaceous- Tertiary) .
C) 55 million years ago (Paleocene- Eocene) .
D) 250 million years ago (Permo- Triassic) .
Correct Answer:
Verified
Correct Answer:
Verified
Q17: The primary change in the Earth's environment
Q18: Explain how weathering features may indicate the
Q19: Of the following organisms, the best index
Q20: Briefly discuss how fossils form.
Q21: All of the following are important causes
Q23: Describe the basic principles of radiometric dating.
Q24: Evidence of the Earth's early atmosphere was
Q25: The oldest remains of life have been
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