GRE Text Completion Question 545
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Source: XDF
Some paleontologists debate whether the diversity of species has_____ since the Cambrian period, or whether imperfections in the fossil record only suggest greater diversity today, while in actuality there has been either_____ or decreased diversity.
| Blank(i) | Blank(ii) |
|---|---|
| A change | D stasis |
| B declined | E escalation |
| C increased | F discontinuity |