Phenomenon of transformation was discovered by Griffith in which of the following?

✅Explanation:
-In 1928, Frederick Griffith discovered the phenomenon of transformation in the bacterium Diplococcus pneumoniae, which is now known as Streptococcus pneumoniae. He observed that a harmless strain of the bacterium could be transformed into a virulent strain by adding heat-killed cells of the virulent strain. The transforming principle was later identified as DNA.

Other options explanations:
-b) E. coli: Transformation was also discovered in E. coli in the 1940s by Avery, MacLeod, and McCarty.
-c) Bacillus subtilis: Transformation was also discovered in Bacillus subtilis in the 1950s by Anagnostopoulos and Spizizen.

🔴 Related terminologies:
-Transformation: The process by which a cell takes up DNA from the environment and incorporates it into its own genome.
-Transduction: The process by which DNA is transferred from one bacterium to another by a virus.
-Conjugation: The process by which DNA is transferred from one bacterium to another by a physical connection.