The structure that protects and encases the lungs and heart of a human is shown labeled with the letter
a. y
b. z
c. w
d. x

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

What is a traditional chinese touch therapy involving finger pressure applied to specific areas of the body to restore the flow of qi.

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?