The skulls you observed are arranged from earliest to most recent, what changes do you think are the most dramatic and why? What cranial features distinguish Genus Homo from other hominins? Explain the importance of the Australopithecines. What is the significance of the presence or absence of a sagittal keel? Compare the skull of Archaic Homo sapiens to Homo sapiens sapiens. Why do you think this species is considered a Homo sapien and not an entirely different species? Think back to the fossil primates you observed last week. What are some of the major cranial differences between non-hominins and hominins?
Your answers must contain 2-3 sentences for each question.
- The skulls you observed are arranged from earliest to most recent, what changes do you think are the most dramatic and why?
- What cranial features distinguish Genus Homo from other hominins?
- Explain the importance of the Australopithecines.
- What is the significance of the presence or absence of a sagittal keel?
- Compare the skull of Archaic Homo sapiens to Homo sapiens sapiens. Why do you think this species is considered a Homo sapien and not an entirely different species?
- Think back to the fossil primates you observed last week. What are some of the major cranial differences between non-hominins and hominins?
First question:-
Changes:-
As the severe climate of the ice age ended the bodies and faces of most large animals have gotten smaller. In human, chewing softer, processed food also has contribution to reducing face size by decreasing the largness of our jaws and jaws muscle.
Explanation:-
Each skull has a large diastema or gap between the front and back teeth. The major difference between modern skull and old skulls and earlier human ancestors. The major changes appear in the cranial base, the plate of bone that forms both the roof of our brain case.
Thus, a sharper downward bend in the platform at a position near the temples makes mordern skulls rounder than those of more ancient species. The fkexon which coincided with a forward extension of the cranial base, also moved faces under the front part of the brain and eliminated heavy brow ridges.
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