The relevant images are attached as well\' Thank you!! 168 Chapter 9 The Early H
ID: 163631 • Letter: T
Question
The relevant images are attached as well' Thank you!!168 Chapter 9 The Early Hominids 5. Compare a "robust" ne cranium with to that of A. anus. Make of the differences of the crania and dentition of the two forms 6. Compare the dentition of A. africanus (Figure 9.14) with that of the more ancient A. afarensis (Figures 9.3 and 9.4). In what ways can the dentition of A. afarensis be said to be more than that of A. africanus? Based on this evidence, do you believe A. afarensis is a good candidate for A. africanus? primitive ancestral 7. observe the proximal femur of Australopithecus robustus (Figure 9.13. How is it different fom the proximal femur of humans? 8 observe the dentition of the Taung child (Figures 9.9 and 9.10.All but each humans and at about age permanent molar the molars (one in was three in at about age six years in modern (Schultz, How old Taung do you think the 9. This exercise is designed to demonstrate the increase in importance of the check reduction in the same kynl l
Explanation / Answer
Ques-1: Compare a robust australopithecine cranium with dentition to that of A africanus. Make a list of the differences of the crania and dentition of the two forms
Australopithecus robustus and Australopithecus boisei have not considered as ancestor species to modern humans as they possess heavy bone structure associated with bigger teeth similar to A africanus. These features are suggesting that these two species are not belongs ancestral origin of modern humans.
Australopithecus and A africanus are bipedal organisms and they supported by abductor powerful gluteal muscles to allow weight balance along body midline. The "robust species" and other Australopithecus africanus characterized by having tiny brain in their cranium; they possess big teeth (dentition) and were well-adapted bipeds for locomotion. These species have lived 2.5 and 2 million years ago. Australopithecus africanus have post- canine megadontia refers to large molars and premolars compared to anterior teeth. The megadontia are present in "robust species" helpful to autralopithecines for mastication of very hard, bony gritty food.
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