Answer
4
Work Step by Step
Precipitation--cloudy white line.
Precipitation is caused by the interaction of soluble antigens with IgM or IgG antibodies.
Microbiology: An Introduction, 11th Edition
by Tortora, Gerard J.; Funke, Berdell R.; Case, Christine L.
Published by
Benjamin Cummings
ISBN 10:
0321733606
ISBN 13:
978-0-32173-360-3
Chapter 18 - Practical Applications of Immunology - Study Questions - Review - Page 526: 9f
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