Thank you!! Chapter 9: The Eany Hominids 167 SECTION EERCISE 9.1 NAME DATE. L ob

Question

Thank you!!
Chapter 9: The Eany Hominids 167 SECTION EERCISE 9.1 NAME DATE. L observe the remains of a in your laboratory or in Figure 9.2. Pelvic remains A. a later species. A ajricanus (Figure 9.5), are very similar to those of arensis. of Name similarities of the A afarensis pelves to that of modern humans. How are they different? 2 Using the criteria of ape and human dentition from previous chapters, analyze the dentition of A. afarensis (Figures 9.3 and 9.4). In what ways is the dentition ape-like? In what ways human- like? the of A. afarensis (Figure 9.6) o those of apes and humans. How are they ape-like? How are they human-like? 4. What are habitat? What are the advantages of being at least the advantages of being bipedal in a savanna arguments for somewhat arboreal in a savanna habitat What is your opinion about the and against A. afarensis having a strong arboreal component in its "lifestyle"

Explanation / Answer

1. a. The pelvis of A. afarensis is very similar to humans. The similarities are as follows-

short and wide iliac blades

attachment area for knee extensors are present.

wide sacrum which is present behind the hip joint.

b. Differences-

Pelvis is wide

iliac blades are laterally oriented.

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