Answer
Fig.18.19
Although there is an abnormally large number of white blood cells (WBCs) in the smear, they are immature cells, and are unable to defend the body effectively.
Work Step by Step
Leukemia is a condition in which there is an extremely large number of leukocytes and their precursors in the blood. These precursors, though impressive in numbers, are unable to provide successful defense against infection.