 certain lips and fertilization are vague to personality and other lips and molecule are vague to recessive & if a part of an animal is specific to a type of animal, then that part can be used to determine whether or not that animal was that type of animal -> teeth and jaws can be used to determine whether an animal is a carnivore or an herbivore teeth and jaws can be used to determine whether an animal is a carnivore or an herbivore