Answer:
D
Explanation:
The fossil record provide evidence that Older species have rise to more recent species
C. on the tongue,lining of the cheeks and on the roof of the mouth.
The spinal cord is surrounded by bones (vertebrae), extends downward from the base.
<span>The myelin sheath allows nerve impulses to propagate very quickly along a nerve's axon to transport the signal between nerve cells. The myelin coating allows the chain reaction of impulses to jump certain distances instead of waiting for the chemical changes to happen at all points on the axon.</span>
