The respiratory advantage provided by a four-chambered heart over a three-chambered heart in vertebrates is

A) the combining of oxygen-rich blood with oxygen-poor blood.
B) a reduction in the amount of hemoglobin required.
C) decreased dependency on lungs.
D) separation of oxygen-rich blood and oxygen-poor blood.
E) a greater surface area for the diffusion of oxygen into the blood.

_______________________ unionism focuses on representing all workers within a given industry.

Where is blood flow slowest?

A) arteries
B) arterioles
C) capillaries
D) venules
E) veins

How can organized labor use participation in ESOPs as both a defensive and offensive tool in strengthening labor's bargaining power?