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EVOLUTION OF ANIMALS 



Part V 



Fig. 37.21 Center, the gibbon is the smallest (about three feet tall) of the four 

 manlike apes — gibbon, orangutan, gorilla and chimpanzee. The orang {top) has 

 a small opposable thumb suggesting the human hand and hand-like feet. A 

 large male gorilla {left) weighs about 600 pounds. Right, a young chimpanzee. 

 (Courtesy, Museum of Comparative Zoology, Harvard University.) 



