Exam 6: Early Hominins 

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Sahelanthropus tchadensis, or Toumai,

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What is the most important difference between Australopithecus afarensis and the modern apes?

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Which of the following statements about the so-called "black skull" is FALSE?

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Although the first hominins appeared late in the Miocene, most hominin fossils have been dated to

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The dentition of Au. afarensis exhibits some similarities to the dentition of modern chimpanzees.

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What do the skull, jaws, and teeth of australopiths indicate?

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The genus Homo did not appear until after all the australopiths had died off.

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Which of the following statements about Ardipithecus kadabba is FALSE?

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Sexual dimorphism is less pronounced in modern Homo sapiens than in the australopiths.

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Which of the following hominin traits is key to differentiating early hominins from the apes?

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Bipedalism has traditionally been viewed as an adaptation to open grassland or savanna country, although Ardipithecus lived in a humid woodland habitat. Perhaps bipedalism developed in the woodlands but became even more adaptive in a savanna habitat.

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Oldowan tools were made by striking flakes off the sides of cores.

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Interestingly, some of the physical markers that have led scientists to identify certain fossils as early hominins rather than apes are features that have been lost during subsequent human evolution. Which of the following is an example of this?

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What major hominin group, for which we have an extensive fossil record, lived from approximately 4 to 1 m.y.a.?

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Which of the following is/are evidence of robust australopiths' adaptation to eating hard-shelled seeds and grasses?

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Northern Tanzania and the Afar region of Ethiopia have yielded some of the most famous and informative glimpses into hominin evolution. Which of the following statements about fossil finds in these areas is FALSE?

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The hominins known collectively as the australopiths had at least eight species,

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Which of the following statements about Orrorin tugenensis is accurate?

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Orrorin tugenensis and the Toumai specimen are unquestionably hominins.

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What is the term for the bony protuberance found on top of the skulls of robust australopiths?

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