Final answer:
False. The alar plate and basal plate are not separated by the sulcus limitans.
Step-by-step explanation:
False. The alar plate and basal plate are not separated by the sulcus limitans. In fact, the sulcus limitans itself is a narrow groove that runs longitudinally along the dorsal side of the developing spinal cord, dividing it into the alar plate and basal plate.
The alar plate is on the dorsal side of the neural tube and gives rise to neurons that will receive sensory input from the periphery. On the other hand, the basal plate is closest to the ventral midline of the neural tube and gives rise to motor neurons.