Critical Thinking Questions b. Which parts of the Lucy skeleton are most informa

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Critical Thinking Questions b. Which parts of the Lucy skeleton are most informative? thecus primitive? Why do many paleoanthropologists classify these forms as hominins? How sure are we? Assume that you are in the labo- ratory analyzing the Lucy A. afa rensis skeleton. You also have complete skeletons from a chim panzee and a modern human a. Which parts of the Lucy skel 1. Assume you have been asked to compare the paleoanthropologi cal evidence (including hom inin fossils) from two sites in East Africa. What sorts of dating techniques might you use, and why would you choose one over another? Be sure to discuss and compare at least one relative dat ing and one chronometric dating technique Write down a list of the areas of expertise needed to conduct a paleoanthropological investiga tion from start to finish. Then list what each specialty contrib- utes to the overall project. Why are multidisciplinary efforts so important for ensuring success? 4. 3. eton are more similar to thee chimpanzee? Which are more similar to the human? 2. In what ways are the remains of Sahelanthropus and Ardipi

Explanation / Answer

2.

Fossils help to investigate the evolution and relationship between their nearest relative. The fossil’s study can help in reconstructing the anatomy, behavior and evolution of an extinct organism. Fossil preserved in the rock can be extracted by using acid.

Sahelanthropus is an extinct species of hominin. It was dated about seven million years ago. They might have walked on two legs. No postcranial are known in them. Ardipithecus is an extinct species of hominin and is one the earliest ancestor for humans.

Sahelanthropus and Ardipithecus serve as the ancestor of humans and were the intermediate within people and apes. These are similar enough biologically to be considered from the same tribe of biology. As they were upright walkers and two-footed this feature makes them be classified as hominins.

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