Frederick Griffith conducted experiments where nonlethal bacteria acquired the ability to cause lethal pneumonia due to the presence of an unknown chemical. This chemical was later found to be

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Frederick Griffith's experiments showed that nonlethal bacteria could acquire the ability to cause lethal pneumonia when exposed to a substance from the dead, virulent strain of bacteria. Later studies showed that this transforming substance was DNA, which carries genetic information and can cause changes in the genetic makeup of the bacteria. This discovery was a key event in the history of genetics and paved the way for further research on molecular genetics and gene expression.

Frederick Griffith Conducted Experiments Where Nonlethal Bacteria Acquired the Ability