GRE Text Completion Question 3910
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Source: VW
Scientists cannot (i) _____date when whales evolved to feed using baleen, a filtering structure used to (ii) _____prey from seawater. Because it is made of keratin, a protein, baleen rarely fossilizes, and the carbon-dating of any fossils found does not conclusively prove age. However, some researchers have attempted to date the modification by (iii) _____baleen-related skull modifications and formations of the jaw.
| Blank(i) | Blank(ii) | Blank(iii) |
|---|---|---|
| A germanely | D sieve | G hypothesizing |
| B definitively | E consume | H assaying |
| C cogently | F locate | I validating |