What happened when Griffith injected mice with the harmless, R-strain bacteria alone? Naim 01:35 Biology What happened when Griffith injected mice with the harmless, R-strain bacteria alone? a. The bacteria transformed. b. The mouse lived. c. The mouse died. d. The bacteria died. Answer: b. The mouse lived. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+