History, 11.12.2020 01:00, nepats222

A scientist studied four fossils of a marine mammal dating back to 50 million years, 45 million years, 40 million years, and 30 million years ago. Which fossil is most similar to the present-day mammal? 30 million years
40 million years
45 million years
50 million years

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A scientist studied four fossils of a marine mammal dating back to 50 million years, 45 million year...