The development, by B lymphocyte precursors in the bone marrow, of receptors for every possible type of antigen is called:

If the scene of a motor vehicle crash has been secured when you arrive, you should park the ambulance:

a. next to the wreckage. c. in front of the wreckage. b. behind the wreckage. d. behind a police vehicle.

Mineral bioavailability widely varies among minerals and is influenced by

A) Food and meal composition B) Processing C) Body nutrient status D) All of the above