The pathogens in the rotten apple had spread to the apples in Bag 2 and 3, while the apples in Bag 1 and 4 remained fresh because pathogens were not peresent or were killed.
Pathogens are disease causing organisms which are spread from one person to another directly or indirectly.
In the following experiment, a rotten apple contains pathogens which can spread by direct contact to the other apples.
At the end of the week, the apples in Bag 1 and 4 remains relatively fresh because the pathogens that were either not present it were killed when in contact with rubbing alcohol.
The apple in Bag 2 had gone bad while that in Bag 3 had gone bad the most.
Therefore, the pathogens in the rotten apple had spread to the apples in Bag 2 and 3, while the apples in Bag 1 and 4 remained fresh because pathogens were not peresent or were killed.
Learn more about pathogens at: https://brainly.com/question/1008643
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