For the answer to the question above, <span>Griffith heated a culture of a disease- causing the strain of the bacteria, which killed the bacteria but didn't destroy the DNA. When he mixed the heat-killed, disease-causing bacteria with live harmless bacteria, the DNA from the disease-causing bacteria was infused to the live bacteria. This kind of bacteria and their offspring caused pneumonia to the mice.</span>
Insects become resistant to pesticides after being exposed to it for some time.
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