A force is a push or a pull. When one object pushes or pulls another object, you say that the first object is exerting a force on the second object.
The immune system is the bodies defense against invaders and is located in all body tissues with concentration in the mucosal surfaces and skin.
The nucleolus is the central support structure
The mailman could not be the father.
The mother did not give the baby its B type blood, and a type O father could not have given this blood type. Therefore, the mailman did not father the baby.
