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Question
The earth is about ________ old.a. 2.5 million years
b. 4.6 billion years
c. 1 million years
d. 50 billion years
Answer
This answer is hidden. It contains 1 characters.
Related questions
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b. through research indicating that most genetic variation is found across human populations.
c. through the examination of variation in multiple human skull characteristics.
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d. all of the above.