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02 Jun 2026, 05:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
71% (01:35) correct
29%
(03:51)
wrong
based on 14
sessions
History
Date
Time
Result
Not Attempted Yet
The fossil record indicates that the teeth of many early hominids, particularly males, have wear grooves in certain locations between adjacent teeth. According to the most influential view, toothpick use explains the known distribution and anatomical placement of these grooves. Consequently, the wear grooves have been taken to hold important clues to early hominid diet and oral hygiene habits. However, the tooth-picking hypothesis may not be the proper explanation since ________.
Which of the following most logically completes the passage?
A. some fossils of hominid children have been found with teeth free of wear grooves
B. it fails to explain why wear grooves are found on some teeth of early hominids but not on some of their other teeth
C. the grooves could just as likely have resulted from using the teeth to strip grain from stalks
D. evidence shows that some female hominids had little access to foods that would stick in teeth
E. modern toothpicks are designed in a way that does not cause wear grooves
Which of the following most logically completes the passage?
A. some fossils of hominid children have been found with teeth free of wear grooves
B. it fails to explain why wear grooves are found on some teeth of early hominids but not on some of their other teeth
C. the grooves could just as likely have resulted from using the teeth to strip grain from stalks
D. evidence shows that some female hominids had little access to foods that would stick in teeth
E. modern toothpicks are designed in a way that does not cause wear grooves
02 Jun 2026, 06:20
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The most logical completion for the passage is: "the grooves could just as likely have resulted from using the teeth to strip grain from stalks".
02 Jun 2026, 06:38
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smithgmat123
I can see why C is attractive, since it provides an alternative explanation for the grooves. However, I’m struggling to see why it would rule out the toothpick hypothesis. Even if some grooves could have resulted from using teeth to strip grain from stalks, couldn’t others still have been caused by toothpick use? In other words, C seems to offer a possible alternative cause rather than showing that the toothpick hypothesis is not the proper explanation.😊
