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Alenkinab [10]
3 years ago
11

During the Ordovician period, it is believed that the sea levels dropped due to the movement of the continents. This event led t

o the extinction of over 50 percent of all life on earth. This event occurred about A) 5 billion years ago. B) 475 million years ago. C) 450 thousand years ago. Eliminate D) 500 million years ago.
Biology
1 answer:
RUDIKE [14]3 years ago
3 0
The Ordovician period ended 443.7 million years ago, so i guess the answer choice would be B, as that is the closest to the time span. 
C might be a typo though. i would ask the teacher if it is a typo or not.
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