Question

Griffith's experiments showed that

Select one:
a. harmful bacteria were hardier than harmless bacteria.
b. genetic material could be transferred between dead bacteria and living bacteria.
c. dead bacteria could be brought back to life.
d. heat caused the harmful and harmless varieties of bacteria to fuse.

Answer 1

Griffith's experiments showed that something from the heat-killed S strain transformed the live R strain into the pathogenic S strain.

Step-by-step explanation:

Fredrick Griffith's experiments showed that when he injected a mixture of live R strain and heat-killed S strain of Streptococcus pneumoniae bacteria into mice, the mice died. Upon isolating the live bacteria from the dead mouse, he only recovered the S strain of bacteria. When this isolated S strain was injected into fresh mice, the mice died. Griffith concluded that something from the heat-killed S strain had transformed the live R strain into the pathogenic S strain. This phenomenon came to be known as Griffith's transformation experiments.