Multiple Choice
What is still lacking in the hypothesis of an asteroid impact as the cause of the end-Cretaceous mass extinction?
A) evidence for what caused such high species loss after the impact
B) evidence that an asteroid hit Earth at the time of the extinction (65 million years ago)
C) a convincing explanation of why mammals radiated after the event
D) a complete explanation of why some lineages survived while others vanished
Correct Answer:

Verified
Correct Answer:
Verified
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