Phenylketonuria is an inherited disorder. affected individuals have a defective enzyme called phenylalanine hydroxylase. the substance these individuals cannot break down is a(n):

You find a fossil that you are sure shows evidence of bipedalism. you know this because which of the following anatomical traits is present? a. thighbones that angle in toward the knees b. a narrow pelvis c. opposable hallux d. posterior position of the foramen magnum