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Q8: Isotopically light carbon that _ preferentially extract
Q12: In contrast to younger eras, the detailed
Q15: The classification of superfamily is the next
Q18: Pikaia was a swimming chordate whose fossils
Q22: The trade winds blow toward the equator
Q27: Select the layer below that is NOT
Q28: The Neoproterozoic radiation of large, conspicuous animals
Q31: Some skeptics believe that the prevalence of
Q51: George has the most common type of
Q75: Which of these is NOT true regarding