In his work with pneumonia-causing bacteria, Frederick Griffith found that a non-pathogenic strain had been transformed into a pathogenic strain.Which of the following explanations best describes the phenomenon of transformation?

It refers to transfer of genetic material between bacteria through direct cell to cell contact.
It refers to introduction of genetic material into animal cells.
It refers to genetic material taken up from the environment through bacterial cell walls.

Question

In his work with pneumonia-causing bacteria, Frederick Griffith found that a non-pathogenic strain had been transformed into a pathogenic strain.Which of the following explanations best describes the phenomenon of transformation?

It refers to transfer of genetic material between bacteria through direct cell to cell contact.
It refers to introduction of genetic material into animal cells.
It refers to genetic material taken up from the environment through bacterial cell walls.