Before there were modern humans on Earth (i.e., before 200,000 years ago), how many species became extinct each year? Assume there have always been exactly 10 million species.
A. 10/year
B. 1/year
C. 100/year
D. 1000/year
Answer: A
Environmental & Atmospheric Sciences
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What will be an ideal response?
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________ is a variety of sandstone that is associated with submarine landslides called turbidity currents
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Environmental & Atmospheric Sciences