Biology

4 August, 07:02

Frederic Griffith discovered transformation in his experiments on mice and Pneumococcus bacteria. He injected the mice with combinations of harmless, R-strain bacteria and disease-causing S-strain bacteria. Which combination of bacteria killed the mice and showed that transformation occurred?

A.

heat-killed R-strain and live S-strain

B.

heat-killed S-strain and live R-strain

C.

heat-killed bacteria of both strains

D.

live bacteria of both strains

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