GRE Text Completion Question 413
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Source: XDF
The history of global diversity suggests that biological diversity was hard won and a long time in coming. Furthermore, this pattern of increase was (i)_____by five massive extinction episodes. The most recent of these, during the Cretaceous period, is by far the most famous. But the cretaceous crisis was (ii)_____compared with the Permian extinctions 240 million years ago, during which between 77 and 96 percent of marine animal species (iii)_____. It took 5 million years, well into Mesozoic times, for species diversity to begin a significant recovery.
| Blank(i) | Blank(ii) | Blank(iii) |
|---|---|---|
| A set back | D distorting | G flourish |
| B aid to | E minor | H perished |
| C conjure for | F neutral | I demystify |