Final answer:
Frederick Griffith was a British bacteriologist who conducted experiments that showed the concept of bacterial transformation.
Step-by-step explanation:
Frederick Griffith was a British bacteriologist known for his experiments that demonstrated the concept of bacterial transformation, which is the transfer of genetic material from one bacterium to another. In 1928, he conducted a landmark experiment with Streptococcus pneumoniae bacteria, where he found that dead pathogenic bacteria could transfer their genetic material to live non-pathogenic bacteria, thereby making them pathogenic. This discovery laid the foundation for our understanding of DNA and gene transfer.