Juvenile diabetes is a disease caused by the body's inability to create insulin. The body's white blood cells attack the pancreatic cells that produce insulin. This type of disease is known as
A: an autoimmune disease.

A student is asked to bring something that feels rough to class. Which would be BEST for him to bring?
A: Sandpaper

A person in a dark room looking through a window can clearly see a person outside in the daylight. But a person outside cannot see the person inside. Why does this happen?
A: There is not enough light being reflected off the person in the room.

If its food supply in a field decreases, the mouse population in that field will probably
A:
decrease.