One feature that can be used to identify a Homo erectus skull is the presence of an occipital torus , which is present on fossil c .

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The question asks us to identify features that can be used to identify a Homo erectus skull, specifically the presence of an occipital torus, and it notes that this feature is present on fossil c.
Option 1: torus
- Here, the term torus refers to the occipital torus, a prominent bony ridge along the back of the skull in some hominin species, including Homo erectus. If the skull exhibits an occipital torus, that is a distinguishing feature that can help identify it as Homo erectus. The reasoning hinges on recognizing that the occipital torus is a characteristic trait used in comparative anatomy to differentiate skulls.
Option 2: c
- The label 'c' designates the third fossil image in the figure. The statement asserts that the occipital torus is present on fossil c. If fossil c indeed shows the occipital torus, then identifying fossil c as the specimen with that feature aligns with the claim that Homo erectus skulls can be recognized by this ridge. The correctness of selecting 'c' depends on visually confirming the torus on the illustrated skull in panel c.
Why the other choices are not independently problematic or misleading:
- If one only chose 'torus' without linking it to a specific specimen, you would still be pointing to the feature itself, which is valid, but it is often important in such exercises to indicate which image demonstrates the feature. 
- If one only chose 'c' without acknowledging that the feature is the occipital torus, you would be assuming identification of the specimen without explicitly naming the feature. Here, the prompt ties the feature (occipital torus) to the specimen (fossil c), so both selections correctly reflect the relationship.
Overall, the combination 'torus' and 'c' correctly identifies both the feature (occipital torus) and the specimen that displays it (fossil c), which is consistent with the stated cue in the prompt.

FA25 ANTHRO 105 001, 002 Laboratory Assignment 10: Early Homo

One feature that can be used to identify a Homo erectus skull is the presence of an occipital torus , which is present on fossil c .

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