1. Knuckle walking and fist walking are exceedingly rare methods of locomotion among animals. A…

1. Knuckle walking and fist walking are exceedingly rare methods
of locomotion among animals. A similar type of locomotion occurs in a few other
unusual cases such as the giant anteater and a few sloths. Why do you think it
evolved in only these animalswhat advantage does it bring? Why do you think
humans lost this trait? What does this trait indicate about the different of
animals have for their forelimbs?

2. Briefly describe (one sentence each) the three main models
of the origin of Homo sapiens from Homo erectus. Which have been rejected, and why?
What is the most likely scenario,

1. Knuckle walking and fist walking are exceedingly rare methods
of locomotion among animals. A similar type of locomotion occurs in a few other
unusual cases such as the giant anteater and a few sloths. Why do you think it
evolved in only these animalswhat advantage does it bring? Why do you think
humans lost this trait? What does this trait indicate about the different of
animals have for their forelimbs?

2. Briefly describe (one sentence each) the three main models
of the origin of Homo sapiens from Homo erectus. Which have been rejected, and why?
What is the most likely scenario, given the evidence? What questions about the
origins of present-day geographic variation remain?

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