5_03 Primate Evolution

5_03 Primate Evolution - 5.03 Primate Evolution Safety...

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5.03 Primate Evolution Safety Notes: Skull casts are fragile, so always handle with care. Materials: Skull casts: 4 known species and 1 unknown Calipers Purpose: Observe and compare physical features of primate skulls. Examine possible relationships based on the observed features. Hypothesis: I believe that the unknown skull’s species is the Australopithecus afarensis, because the unknown skull is slim like the afarensis, and the eyebrow, cheek, and upper jaw bones are similar in shape. Procedure: Qualitative Observations: Line up each of the skulls on the lab table, facing to the left, with the Frankfurt planes parallel to the ground. Observe each skull from the side, recording your observations about the following features:
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Forehead: Is the angle of the forehead sloping or more vertical? Is the brow ridge above the eyes small, medium, or large? Does the forehead extend out above the eyes? Face: Is the shape of the face sloped or flattened and vertical?
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