GRE Text Completion Question 277
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Source: XDF
Once a duckling has identified a parent, the instinctive bond become a powerful _____for additional learning since, by _____the parent, the duckling can acquire further information that is not genetically transmitted.
| Blank(i) | Blank(ii) |
|---|---|
| A inspiration | D acknowledging |
| B channel | E mimicking |
| C impulse | F emulating |