one major difference in the skeleton of a typical ape and an old world monkey is that … a. old world monkeys have more flexible shoulder joints than apes. b. apes have longer thumbs and shorter fingers than old world monkeys. c. except for humans, apes have longer arms than legs. d. ape shoulder blades (scapulae) are on the sides of the ribcage. e. old world monkeys have a more flexible lumbar spine than apes.