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Our Origins: Discovering Physical Anthropology (Fourth Edition)
4th Edition
ISBN: 9780393614008
Author: Clark Spencer Larsen
Publisher: W. W. Norton & Company
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Chapter 11, Problem 2ER
Summary Introduction
To explain: Three examples of anatomical features that differ in H. habilis and H. erectus and the evolutionary trends seen between H. habilis and H. erectus.
Introduction: The genus Homo comprises modern humans as well as their close relatives. The hominin Homo erectus has appeared around 1.8 million years ago and it was considered as a descendant taxon of earliest hominin Homo habilis.
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Students have asked these similar questions
What is the difference between a "derived"
versus a “primitive" trait? Give an example
of both, seen in Au. afarensis.
Which of the paleoenvironment hypotheses
have been used to describe early hominin
diversity, and which have been used to
describe bipedalism?
Which anatomical features for bipedalism
do we see in early hominins? Are these
primarily obligate bipeds? Explain.
Describe the dentition of gracile and robust
australopithecines. What might these tell us
about their relative diets?
List the hominin species argued to be
associated with stone tool technologies. Are
you convinced of these associations?
Why/why not?
Paleoanthropologists generally agree that Homo erectus belongs in our genus and represents a significant shift towards adaptations important to our own species. However, there is much variation among specimens that are grouped into H. erectus. Your instructor will let you know which of these fossil representatives to use for the exercise today.Based on your measurements and comparisons in the table above, what are major differences among Au. africanus, H. habilis, and H. erectus? Do you think H. habilis is more like Australopithecus or Homo?
How do these three species reflect the major environmental pressures of the time periods in which they lived, respectively?
List three features that are changing in the genus Homo due to these selective pressures.
List three features found in H. erectus that are derived, compared to Au. africanus.
1) Of all of the robust australopithecines, I am the most primitive, dated to 2.5 mya. I have an enormous sagittal crest on the top of my head, a back of the skull that looks like A. afarensis, and am quite prognathic. My discovery seemed to justify my removal from the genus Australopithecus, and the creation of an new genus with two other species sharing similar anatomy.....................
2. Why did the scientists in England not believe that Raymond Dart's Taung Child fossil was an early human ancestor? Check all that apply. a) The Piltdown Man fossil was considered a better early human ancestor. b) It had a small brain. c) No other fossils had been found in Africa. d) It was found in caves. e)The Taung Child lacked any human-like traits.
Chapter 11 Solutions
Our Origins: Discovering Physical Anthropology (Fourth Edition)
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