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Biology
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OpenStudy (anonymous):
1. When a mouse was injected with the rough strain of pneumonia, it lived. 2. When a mouse was injected with the smooth strain of pneumonia, it died. 3. When a mouse was injected with heat-killed smooth strain, it lived. 4. When a mouse was injected with a mix of the rough and heat-killed smooth strains, it died. What can I conclude from the first 2 statements? What can I conclude from the 3rd statement? What can I conclude from the 4th statement?
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