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Chapter 5


1: In the late 1920's a scientist named Fred Griffith was studying Streptococcus pneumoniae a bacterium that causes pneumonia. He injected both a living S strain of S. pneumoniae and a living R strain of S pneumoniae (which was harmless) and also a heat killed S strain of S. pneumoniae into some mice. In which cases did the mice die?

a. when injected with the living S strain
b. when injected with the living R strain
c. when injected with a heat killed S strain
d. when injected with a living R strain and a heat killed S strain
e. both a and b
f. both a and d

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Chapter 7
Chapter 8
Chapter 10
Chapter 18

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