the long bone of the upper leg is the femur.
Answer:
when Griffith was experimenting with pneumonia-causing bacteria he discovered that when two cultures were mixed, somehow the harmless bacteria changed, and that organism contained information that could be passed on to another organism.
and the phenomenon is stated right there in the answer
~batmans wife dun dun dun...
B.
Many Scientist Helped Developed It Over Many Decades
Hope This Helps.