Fred Griffith discovered that when he injected mice
with a mixture of dead pathogenic S cells and living
harmless R cells of Streptococcus pneumoniae
a. the harmless dead S bacteria became pathogenic
and killed the mice.
b. the mice died, and their bodies teemed with
living pathogenic S strain cells.
c. the pathogenic S strain was transformed into the
harmless R strain.
d. the mice lived, and their bodies teemed with
living harmless R strain cells, and the pathogenic
S strain cells were eliminated.
e. all of these occurred.
Answer: b
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