What was the most significant conclusion of Griffithʹs experiments with pneumonia in mice?
A) Mice exposed to the S-strain bacterium became resistant to the R-strain bacterium.
B) S-strain bacteria can cause pneumonia.
C) Heat destroys the hereditary material.
D) There is a substance present in dead bacteria that can cause a heritable change in living bacteria.
E) The genetic material was definitively proven to be DNA.

Question

Quizplus · Accepted Answer

Griffith's experiments demonstrated that a substance from dead S-strain bacteria could transform live R-strain bacteria into the virulent S form, indicating that a heritable substance could be transferred between bacteria. This was a foundational experiment in understanding bacterial transformation.

What Was the Most Significant Conclusion of Griffithʹs Experiments with Pneumonia