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Lab 15 Exercises 2-7 Australopith & Early Homo Fossils Exercise 2: Australopith Variation Review the image below (also on pg. 449), which contains images of two different Austrolopith species, mystery species A and mystery species B. After comparing the images, answer the questions: 1. Which of these mystery australopiths is a later , more robust form? Mystery australopith B is a later, more robust form 2. Describe two anatomical adaptations used to make this determination. (Be sure to describe how each trait varied in the fossils.) The sagittal crest is a distinguishing trait. On australopith B, a much more pronounced sagittal crest is shown. The teeth are larger on australopith B, showing its robust Exercise 3: Australopith Bipedalism 1. Examine the Lucy ( Au. afarensis ) skeleton. Describe at least two postcranial (below the head) traits that indicate Au. afarensis was adapted for bipedalism. The traits that indicate that Au afarensis was adapted for bipedalism include

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