Answer:
A: Myelin sheath
Explanation:
Myelin sheath swiftly transmits electrical impulses along nerve cells.
<span>There are two structures that would be found at a passive continental margin. These structures are continental shelves and continental slopes.</span>
One of the reasons for the success of the smallpox eradication campaign was that small pox only occurred in humans. Smallpox is an extremely contagious and deadly virus for which there is no known cure. it is caused by two variants, Variola major and Variola minor. it is a disease of the past that was eliminated by worldwide vaccination.
