Biology 10th Edition by Eldra Solomon,Charles Martin,Diana Martin,Linda Berg

تمرين 1

When Griffith injected mice with a combination of live roughstrain and heat-killed smooth-strain pneumococci, he discovered that
A) the mice were unharmed
B) the dead mice contained living rough-strain bacteria
C) the dead mice contained living smooth-strain bacteria
D) DNA had been transferred from the smooth-strain bacteria to the mice
E) DNA had been transferred from the rough-strain bacteria to the smooth-strain bacteria