In the Griffith experiment,why did the mice become ill when injected with a mixture of dead S bacteria and live,capsuleless R bacteria?

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The mice became ill because DNA was passed from the dead virulent S bacteria to the live nonvirulent R bacteria, which transformed the live R bacteria into virulent S bacteria capable of causing disease. Griffith's experiment was the first to demonstrate the concept of bacterial transformation, where genetic material (in this case, DNA) can be transferred between bacterial cells and alter their traits. This experiment laid the foundation for later studies on the structure and function of DNA.

In the Griffith Experiment,why Did the Mice Become Ill When