During fractional crystallization mineral crystals
a) form and break.
b) melt and become part of the magma
c) form and become separated from the magma.
d) change from one mineral type to another

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