4. The degree to which a substance is poisonous or can cause injury is_________.
5. A and B proteins are found on the surface of some red blood cells. If a person’s blood contains both the A and the B proteins, then he or she has,
a. type A blood. c. type AB blood. b. type B blood. d. type O blood.
6. Of the four main human blood types using the ABO system, the largest percentage of the U.S. population is made up of:
a. Type O. c. Type B. b. Type A. d. Type AB.
7. Given blood spatter patterns, it is possible to determine the direction the blood was traveling, the angle of impact, and the point __________.