When Griffith experimented with two types of Streptococcus pneumoniae, he found that if the
A. deadly strain was heat-killed before injection, the mice died.
B. nondeadly strain was mixed with the heat-killed, nondeadly strain before injection, the mice died.
C. nondeadly strain was mixed with the heat-killed, deadly strain before injection, the mice lived.
D. nondeadly strain was mixed with the heat-killed, deadly strain before injection, the mice died.
Answer:D
When Griffith experimented with two types of Streptococcus pneumoniae, he found that if the
A. deadly strain was heat-killed before injection, the mice died. B. nondeadly strain was mixed with the heat-killed, nondeadly strain before injection, the mice died. C. nondeadly strain was mixed with the heat-killed, deadly strain before injection, the mice lived. D. nondeadly strain was mixed with the heat-killed, deadly strain before injection, the mice died.