Cystic fibrosis affects the cells that produce mucus, sweat, and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts, and passageways.
It is an inherited life-threatening disorder that damages the lungs and digestive system.
Answer:
Early humans that likely evolved from Cro-Magnons - <u>Homo</u><u> </u><u>sapiens</u><u>.</u>
The biggest role would be the Brain.
