Blindsight suggests that some parts of the brain may play a special role in

Blind sight suggests that some parts of the brain may play a special role in CONSCIOUSNESS. 
The blind sight phenomenon suggest that not all parts of the brain are involved in consciousness, only some of them play a role in consciousness. 
Consciousness refers to the ability to perceive correctly what we are doing or the events that are going on.

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.