Which new phenomenon did griffith focus on during his work with pneumonia-causing bacteria and mice?

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...

individual oxygen atoms are formed during photosynthesis.-c.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.