The first clear evidence of stone tools appeared more than __________ million years after the appearance of bipedalism.
A) 1
B) 2
C) 4
D) 10
B) 2
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Pleasure, sadness, and anger are shown by similar facial expressions everywhere in the world. This is evidence that
a. all nonverbal language stems from the same proto-language group. b. these expressions may have a biological basis. c. interaction around the world has created a uniform culture of communication. d. these are the only genuine human emotions.
Match the locomotion pattern to the general relative size of arms and legs. (An answer may be used more than once.)
1. erect bipedalism 2. vertical clinging and leaping 3. terrestrial quadrupedalism 4. brachiation 5. knuckle walking legs longer than arms legs longer than arms arms and legs nearly the same length arms longer than legs arms longer than legs
The idea that individuals have characteristics (variations) that allow them to survive in a particular environment and reproduce, passing these traits on to their progeny, is known as __________
A. random chance B. uniformitarianism C. heritability D. natural selection