Which of the following is NOT true of the cartilage of the adult skeleton?

A) Intervertebral discs lie between adjacent vertebrae, and provide shock absorption for the vertebrae.
B) Costal cartilages connect the ribs to the sternum.
C) Articular cartilage is found on the ends of bones in joints, and reduces friction between joint-forming surfaces of the bones.
D) Costal cartilage, articular cartilage, and intervertebral discs are all composed of fibrocartilage.
E) All of these are true of the cartilage of the adult skeleton.

The deltoid can be seen on both the anterior and posterior views of the trunk (torso).

Tay-Sachs is a recessive genetic disease in humans. If one parent is homozygous normal and the other is a carrier (heterozygous) , what are the chances that their child will have this disease?

A) 0%
B) 25%
C) 50%
D) 75%
E) 100%