character: Dr. Emily Johnson
topic: Introduction to Bacteria
grade: 9
subject: Science
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character: Professor Alan Smith
topic: Microbial Diversity
grade: 9
subject: Science
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character: Dr. Maria Lopez
topic: Bacteria in the Environment
grade: 9
subject: Science
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character: Dr. James Thompson
topic: Pathogenic Bacteria and Human Health
grade: 9
subject: Science
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