Antibodies against myelin in multiple sclerosis sometimes cross react with proteins made by what virus?
a. polio virus
b. encephalitis virus
c. epstein-barr virus
d. multiple myeloma virus

c. Epstein-Barr virus

Explanation:

Multiple sclerosis (MS) is a common chronic inflammation which causes progressive disability due to the demyelination of the central nervous system (CNS).The antibodies made against myelin in multiple sclerosis cross-reacts with the proteins made by the Epstein Barr virus and thus, EBV has been implicated in the development of multiple sclerosis. Epstein Barr virus itself is a DNA containing Herpes virus. 

The correct answer to this question would be c

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.