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Explain how each of the following avoids being killed by phagocytes:
a. Shigella dysenteriae
b. Salmonella typhimurium
c. Listeria monocytogenes
Control Group
In experimental research, a group of subjects that does not receive the experimental treatment and is used as a benchmark to measure how the other tested subjects do.
Placebo
An inert or innocuous substance given to a patient instead of genuine medication, used in studies to evaluate the efficacy of treatments.
Confederate
An individual who is part of an experiment but pretends to be a participant and is aware of the study's aims.
Experimental
Pertaining to a methodological approach that involves manipulating one variable to determine if changes in one variable cause changes in another variable.
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