The neuron that will most likely cause disruption in the flow of information in the brain which undergoes through the neurons is the myelin. If this hardens, this will likely disturb the person's flow of information in the brain and this usually happens when a person has multiple sclerosis.
Answer:
C is not sprial galaxy i think
When the sperm and the egg comes together they equal to 46 chromosomes. If the sperm and the egg had less or more than 23 chromosomes the baby would be abnormal/deformed