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Scientists believe that _______ of species that once existed on Earth are now extinct. ​

User Acemtp
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2 Answers

5 votes

Answer: The answer is 1/3

Explanation: There is no explanation it is a simple fact.

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User Brad Figueroa
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Scientist believe that 1/3 of species that once existed on Earth are now extinct

User Guillermo Alvarez
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